In 1933, H. R. Hutchinson, who was the Librarian at the Lindley Library, Royal Horticultural Society's (RHS) in London, was due to retire. John Gilmour, now assistant director at the Kew Gardens, put forward Stearn's name, together with Bowles, a vice-president of the Society, who had discovered Stearn at the bookshop. Stearn was 22 when he began work at the library, initially as assistant librarian, before taking over Hutchinson's position after six months.