That isn’t what happened. For one thing, Pyle’s sense of duty would have kept him on until his contract ran out at the end of the spring semester - or at least until a replacement was found. Besides that, though, this item appeared in The New York Evening Post of Saturday, June 16, 1900:
Last week on Wednesday evening the pupils of Howard Pyle gave him a farewell reception at Drexel Institute, Philadelphia. It was an occasion of welcoming the coming as well as speeding the parting guest, for B. West Clinedinst, the instructor who is to succeed Mr. Pyle, was also present. Speeches were made by both of the men, Mr. Pyle was visibly affected by his leave-taking.