[ Wallace / The Story of Grenfell of the Labrador ]
Sir Wilfred Thomason Grenfell (1865 - 1940) was an English physician who devoted his career to providing medical and social services to the inhabitants of Newfoundland and Labrador; he was knighted for that work.
This book, a biography of Grenfell by the American lawyer, author, and explorer Dillon Wallace (1863 – 1939), was first published in 1922.
The only mention of the dogs of Newfoundland comes amidst a discussion of travel by dog-sledge; while not specifically identified by name as Newfs, the dogs Wallce describes do seem to be our breed:
"The dogs of Newfoundland, such as Doctor Grenfell uses in his winter journeys in going out from St. Anthony to visit patients, are still a different type. These are usually big lop-eared kindly fellows, and just as friendly as any dog in the world."
For another biography of Grenfell that also mentions Newfoundland dogs, see Fullerton Waldo's With Grenfell on the Labrador here at The Cultured Newf.