1911 Encyclopædia Britannica, Volume 24… (1911)
“ Though of the French school, and American by birth, it is as a British artist that he won fame by his vogue as the most sought-after portrait painter of the day, his sitters including the men and women of greatest distinction in the literary, artistic and social life of Europe and America. While best known, and consequently busily employed, as a portrait painter, he had at the same time a disposition towards other, and especially decorative work ”
