Wilfred T. Grenfell was a medical missionary to Newfoundland. The reason he is being profiled on TruthUnity is because of what he writes in What Christ Means To Me, published in 1927.
You can read about his life and work on Wikipedia and on the website of The International Grenfell Association.
He was, as the IGA profile says, a “muscular Christian” who “possessed a profound Christian faith and believed that a vital part of his mission was to spread the Word of God and attend to the spiritual needs of those living on the coast.”