I was saddened to learn of the passing of Morton Cohen at age 96 who obituary is in The New York Times.
Cohen was the premiere Lewis Carroll scholar. He edited the two-volume The Letters of Lewis Carroll, with assistance from Roger Lancelyn Green, which was published in 1979. Cohen's Lewis Carroll: A Biography (1995, is the definitive biography on the Victorian author, photographer, and mathematician.
Cohen was a classic researcher and scholar. While Cohen published many works on Carroll, the edited Letters and the biography form the basis for serious Lewis Carroll scholarship.
I was fortunate to meet Cohen on several occassions through the meetings of the Lewis Carroll Society of North America. He was formal, but friendly. He seemed be a man steeped in Victorian culture.
Cohen was also well known for significant work on H. Rider Haggard.
After a lifetime of researching Lewis Carroll, Cohen wrote his definitive Lewis Carroll: A Biography. Click here or on the title to a link of a .pdf of my book review of Cohen's biography: "On a First-Name Basis with Charles Lutwidge Dodgson" published in Children's Literature 26.