William C. Sullivan, an agent with the Bureau for three decades, reported in his memoir when he worked in the public relations section answering mail from the public, he gave a correspondent the wrong measurements for Hoover's personal popover recipe, relying on memory rather than the files. Gandy, ever protective of her boss, caught the error and brought it to Hoover's attention. The director then placed an official letter of reprimand in Sullivan's file for the lapse. Mark Felt, deputy associate director of the Bureau, wrote in his memoir that Gandy "was bright and alert and quick-tempered—and completely dedicated to her boss."