In the spring of 1888, his father experienced a mental breakdown that left him unable to work, and Sloan became responsible, at the age of sixteen, for the support of his parents and sisters. He dropped out of school in order to work full-time as an assistant cashier at Porter and Coates, a bookstore and seller of fine prints. His duties were light, allowing him many hours to read the books and examine the works in the store's print department. It was there that Sloan created his earliest surviving works, among which are pen-and-ink copies after Dürer and Rembrandt. He also began making etchings, which were sold in the store for a modest sum. In 1890, the offer of a higher salary persuaded Sloan to leave his position to work for A. Edward Newton, a former clerk for Porter and Coates who had opened his own stationery store. At Newton's, Sloan designed greeting cards and calendars and continued to work on his etchings. In that same year he also attended a night drawing class at the Spring Garden Institute, which provided him his first formal art training.