Background
He was born of English parents in Wakefield, Massachusetts.
He was born of English parents in Wakefield, Massachusetts.
He first specialized from 1902-1916 in cancer research and then from 1916 onwards as a parasitologist. "He established during his 40-yr career (1902-1942) an international reputation in oncology, pathology, virology, bacteriology, parasitology, and taxonomic zoology in relation to human and veterinary medicine."
In 1905, he studied histology of the skin lesions in varicella, being the first to recognize inclusion bodies in varicella and published a paper to that effect while employed as an assisant in Pathology at Harvard Medlical School. In 1913, when he was an assistant professor and director of cancer research at Harvard University, he and two other scientists (Doctor Richard P Strong and Doctor Connecticut Brues) studied tropical diseases in Peru and Ecuador.