 Frank, who had been blinded in two separate accidents, believed a guide dog would help him regain his independence.Eustis received his letter and although she did not train dogs for the blind, she decided to help Frank.Frank stated that, in addition to wanting a guide dog, he intended to further the work of training guide dogs for the blind in the U.S. Eustis and Humphrey began to research and modify their own training, as they had previous experience training other types of working dogs, but not guide dogs.