Historians have spent decades trying to separate fact from legend when it comes to Billy the Kid, and new research continues to raise questions about the outlaw’s early life that the classic frontier stories never addressed. One of the most persistent mysteries concerns his mother, Catherine McCarty, whose background and family connections remain clouded in speculation. Catherine McCarty arrived in New York during the mid-19th century, a period when vast numbers of Irish immigrants were fleeing the Great Famine. Many settled in the Five Points District, an area notorious for poverty, overcrowding, and unsanitary conditions.
Historical records indicate that a large percentage of these immigrants spoke Irish rather than English, which made finding stable employment and building a new life especially difficult. Some historians have suggested that Catherine may have initially worked in occupations connected to saloons, boarding houses, or prostitution, as these were often the only options available to poor immigrant women. Researchers note that many Catholic immigrant women followed religious teachings that discouraged abortion, which meant some mothers quietly raised children while avoiding official records to escape the social stigma associated with illegitimacy. Incomplete birth registrations and missing census information are part of the reason Billy the Kid’s origins remain uncertain today.
Born Henry McCarty, the boy who would become one of the most famous outlaws of the American frontier has long been the subject of debate over his birthplace and childhood. Shortly after his death, several newspapers reported that he had been born in New York City, and people who knew him rarely challenged that claim. Writer Ash Upson repeated the belief in the biography he prepared alongside Sheriff Pat Garrett. Some researchers have pointed to Catherine’s later marriage to William Antrim in a Presbyterian church in Santa Fe as a revealing detail.
Since most Irish immigrants of the period were Catholic, historians have questioned whether Catherine distanced herself from the Church for personal or social reasons. While no definitive evidence proves the theory, some writers have suggested the Protestant ceremony may have offered a more practical path for someone wishing to leave behind difficult earlier experiences. People who knew Billy and his brother in Silver City reportedly believed the two boys may have had different fathers, though historians have never confirmed that claim. Researchers also find it notable that Jimmy Dolan, one of Billy’s later rivals during the Lincoln County conflict, was likewise born to Irish immigrant parents connected to New York’s Irish communities.
Another theory involves Billy’s remarkable gift for languages. Witnesses described him speaking Spanish fluently in the Southwest, and oral interviews from the 1950s support the idea that he may have been exposed to Irish as a child. An old cowboy named Clark Hust recalled working for Pat Coglin, an Irish immigrant and acquaintance of Billy the Kid. According to Hust, Coglin brought his niece Mary from Ireland, but she spoke only Irish and could not communicate with the English-speaking cowboys.
Hust claimed Billy helped translate for her, a detail that later historians found fascinating though impossible to fully verify. One of the most discussed theories about Billy the Kid’s paternity involves a man named Edward Finch Bonney. Historical records confirm that by 1860, a 30-year-old domestic servant named Catherine McCarty was employed in the household of the wealthy John Munn family in Utica. Around the same period, brothers John J.
Bonney and Edward Finch Bonney were living only a short distance from the Munn residence. Some modern researchers have proposed that Catherine may have developed a relationship with Edward Finch Bonney. The Bonney family belonged to a socially respected and financially comfortable household in Hamilton, New York, and historians note that social expectations in the mid-19th century often discouraged relationships between wealthy families and domestic servants. Some writers speculate that Catherine may have raised William Henry McCarty separately from the Bonney family.
Members of the Bonney family have pointed to an old family photograph believed to show Edward and Almira Bonney alongside their children, Villa and Homer. Descendants and independent researchers believe the image may hold a connection to Billy the Kid’s family history. Family stories passed down through generations suggest the possibility that Edward Finch Bonney was Billy’s biological father, which would make Villa and Homer his half-siblings. One Bonney descendant, Donald Bonney, stated that family traditions long hinted at some connection between their family and Billy the Kid.
He suggested that hidden scandals and private family matters were often kept secret during the 19th century, making it difficult to uncover the full truth today. Historians have also debated whether Catherine McCarty lived in Indianapolis during the years 1867 and 1868. City directories from that period list a woman identified as Catherine McCarty, widow of Michael McCarty, at several Indianapolis addresses. Catherine was also later known in Wichita as the widow McCarty, which strengthens the possibility that these records refer to Billy the Kid’s mother.
Documents show that Catherine moved frequently while trying to support herself and her two sons, Henry and Joseph. A census taken on June 18, 1868 places the McCarty family in Anderson, Indiana, suggesting they were constantly searching for work and stability. Because city directories rarely included ages or the names of children, historians initially treated the Indianapolis listings as educated assumptions rather than confirmed identifications. One important detail linking Catherine to Indianapolis involves her later husband, William Antrim.
Historical records show that Antrim also lived in the Indianapolis area before the couple relocated westward. By the summer of 1870, William and Catherine had settled in Wichita, Kansas. There Antrim signed a legal statement connected to a federal land purchase in which he declared that he had known Catherine McCarty for the previous six years and described her as the head of a household with two children. If accurate, that statement suggests the two likely met around 1864.
Additional city directory records strengthen the connection between Catherine, Antrim, and the Hoffmire family. In the 1867 Indianapolis directory, Catherine McCarty was listed at 385 North New Jersey Street. By 1868, she appeared at 199 North East Street, the same address associated with William Hoffmire, whose brother Frederick worked alongside William Antrim for the Merchants Union Express Company. Researchers today generally agree that these records strongly support the conclusion that Catherine McCarty, widow of Michael McCarty, was indeed the mother of Billy the Kid.
One of the most widely circulated photographs believed to show Catherine McCarty was later discovered to have been incorrectly identified. The image became famous after historian Eugene Cunningham included it in his influential 1934 book. Cunningham had received the photograph from Western collector Noah Rose during the early 1930s, at a time when authentic Old West photographs were often difficult to verify. Years later, researcher Robert N.
Mullin discussed the issue in correspondence with author James D. Horn. In a detailed 1978 letter, Mullin explained that Noah Rose had occasionally been given photographs with inaccurate labels or uncertain histories. Mullin recalled that Cunningham himself eventually learned the photograph was not actually Catherine McCarty after receiving a letter from a man living in either Kansas or Nebraska.
The man enclosed another copy of the same photograph and pointed out that the woman pictured was actually his own mother. The photographer’s imprint reportedly dated the image to 1889, several years after Catherine McCarty’s death. Although Cunningham reportedly chose not to publicly emphasize the mistake, he intended to correct the error in a future revised edition of his book. He planned to replace the image with what he believed to be an authentic photograph of Catherine McCarty taken in Silver City around 1873.
According to Mullin, that image had been identified by long-time Silver City residents, including Sheriff Harvey Whitehill and Chauncey Truesdell, both of whom claimed to remember Catherine from the early 1870s. Mullin later used this alternate photograph, along with an image said to show a young Henry Antrim, in his own work, The Boyhood of Billy the Kid. He explained that the photographs came from Lawrence E. Gay of Lordsburg, New Mexico, who had obtained them from the belongings of John B.
Merrill, owner of Silver City’s early theater. Local recollections also claim that young Henry Antrim once appeared in a community stage production there, according to his former teacher, Mary Richards. Unfortunately, Mullin stated that the photographs were later lost after being mailed back to him, preventing further examination by historians. By the summer of 1876, the young man who would later become known as Billy the Kid was learning to survive in the rough frontier atmosphere of Prescott.
At only 17 years old, Henry McCarty found himself surrounded by gambling halls, saloons, and the bustling activity of Montezuma Street, better known as Whiskey Row. Prescott, then the capital of Arizona Territory, had grown rapidly because of nearby mining booms, attracting fortune seekers, laborers, merchants, and many of the frontier’s more questionable characters. In September 1875, Henry McCarty reportedly left Silver City and traveled west toward Arizona Territory. Historian Frederick Nolan believed McCarty first worked near Clifton in the Gila River Valley, while other writers claimed he traveled to Globe.
One long repeated story alleged that Billy became involved in an incident with a Chinese resident there, but historians have never uncovered reliable evidence to confirm the account. Records suggest McCarty may have passed through Camp Goodwin in March 1876 while heading toward Fort Grant. By this stage of his life, accusations of horse theft and petty crime had already begun to follow him across the Southwest. Historians have struggled for years to trace his exact movements during the months between March and August 1876, with some theories placing him in Kansas, New York, or even Mexico.
More recent research uncovered an important clue in the Arizona territorial census records. An entry listing H. McCarty in Prescott strongly suggests Billy spent part of the summer of 1876 there instead. This discovery helps explain why historians previously had difficulty locating him in the Gila Valley during that period.
The Prescott census was overseen by Johnny Behan, who at the time served as county clerk and census taker. Behan would later become one of the most recognizable lawmen in Tombstone during the events surrounding the famous gunfight near the OK Corral. The 1876 census also included names of several figures who would later cross paths with Billy the Kid, including Jesse Evans, John Mackey, and W. K.
Hill. One year later in August 1877, Billy encountered Windy Cahill at Camp Grant in an incident that became a turning point in his life. After that event, authorities increasingly viewed him not simply as a wandering frontier youth involved in petty crime, but as a fugitive moving deeper into outlaw territory. Some historians have wondered whether Billy the Kid’s well-known horse may have descended from the prized racing horses owned by Lieutenant Colonel Emil Fritz.
On September 6, 1878, Billy and several members of the Regulators reportedly took horses and cattle from the Fritz Spring Ranch before traveling toward Fort Sumner and the Texas Panhandle. This event later sparked speculation that one of the animals connected to Billy may have originated from Fritz’s respected bloodlines. Emil Fritz, a German-born officer connected to the California column during the Civil War era, was known for keeping fine racehorses. A manuscript preserved at the Tucson Museum contains recollections from Hilario Gallego, who remembered the arrival of Union troops in Tucson in 1862.
According to Gallego, Colonel Fritz owned several impressive horses, including one reportedly named Dandy. Gallego claimed he even served as a jockey for Fritz before later traveling east with him and the horses for several years. Military records from the period confirm that officers closely monitored the condition of cavalry and grazing horses during the Civil War. Fritz frequently received orders to inspect and report on horses under his supervision, suggesting that these animals were considered valuable military property.
Several incidents from the era highlight how important horses were in the Southwest during the 1860s, with thefts often prompting lengthy pursuits across the border into Mexico. Researchers have also noted that Emil Fritz and William Brady were friends and neighbors in New Mexico territory. Because of these overlapping frontier connections, some writers have speculated that Billy the Kid’s horse, later reportedly sold to Dr. Henry Hoyt in Tascosa, Texas, may have inherited bloodlines connected to Fritz’s famous racehorses.
The story of Billy the Kid may be far darker and more complicated than the legends ever admitted. Even today, historians continue debating which parts of Billy’s story are fact, which are myth, and which truths were quietly buried over time.