I desire to sever all connection with the Society of American Artists. In deference to some of its older members, who perhaps from sentimental motives requested me to reconsider my resignation last year, I shall explain... For the last three years my paintings have been rejected by you, one of them the Agnew portrait, a composition more important than any I have ever seen on your walls. Rejection for three years eliminates all elements of chance, and while in my opinion there are qualities in my work which entitle it to rank with the best in your Society, your Society's opinion must be that it ranks below much that I consider frivolous and superficial. These opinions are irreconcilable.
Letter to the Society of American Artists (1892-05-07).