Question: What is the date of death of Calvin Ellis Stowe's wife?
Sentence (from "Calvin Ellis Stowe"): Calvin Ellis Stowe (April 6, 1802 – August 22, 1886) was an American Biblical scholar who helped spread public education in the United States, and the husband and literary agent of Harriet Beecher Stowe, author of the best-seller "Uncle Tom's Cabin".
Relevant evidence: Yes