Wholly self-educated, Ferguson joined Quaritch in his youth and rose to become managing director. His relatively few publications do not properly reflect his contribution to enumerative bibliography. He gave exemplary service to STC as an editor of the second edition. His achievements were acknowledged by honorary degrees from Oxford (M.A.) and Edinburgh (LL. D.) and the Gold Medal of the Bibliographical Society.
From The Oxford Companion to the Book in Oxford Reference.