See my posting # 399 - this new book mentions James Dane Cann on 5 pages. The book is NOT a family genealogy, so does not mention Harriet Killam. It deals with the vessels owned or skippered by members of the Cann family. The author George Cann plans to issue a genealogy in another year or two.
You should contact the Yarmouth County Museum, whose e-mail I have included in my positng.