 The next year, TSR joined the Hobby Industry Association of America and began exhibiting at their annual trade show, and began to establish a regular network of distributors.When Don Kaye died of a heart attack on January 31, 1975, his role was taken over by his wife Donna Kaye, who remained responsible for accounting, shipping, and the records of the partnership through the summer.By the summer of 1975, those duties became complex enough that Gygax himself became a full-time employee of the partnership in order to take them over from Donna Kaye.