Traditionally, it is thought that the only portrait of Catherwood is in the famous Table XXIV of Views of Ancient Monuments in Central America, Chiapas and Yucatan, with a view of the temple of Tulum. The scholar Fabio Bourbon, after studies and a long reflection, has formulated a different hypothesis. It is well known that during the second expedition in Central America, Stephens and Catherwood were accompanied by a young surgeon (and ornithologist) from Boston, Samuel Cabot III, born in Boston on September 20, 1815. The Cabot family was part of the upper class in Boston. At the time of the trip, he was almost 27 years old. Years later he would become an eminent surgeon and a well known personality in Boston. Samuel III was described as a person rather slender, tall, with light hair and light eyes. There is an image taken by Oliver Wendell Holmes (1809-1894) with members of the Boston Society for Medical Improvement, around 1853. Samuel is seated, third from left. Eleven years had passed since the adventure in Yucatan, but he could very well be the person depicted by Catherwood in the table, holding a measuring tape. Catherwood, in fact, was a pragmatic man, used to documenting the reality with his pencil. Frederick presumably had no interest in representing himself, indeed he never painted his self-portrait.