Harry married Otis's daughter, Marian Otis, in 1894 (two years after the death of his first wife). The couple had six children together and also raised two daughters from Harry's first marriage.
In this passage, we see that Harry married Marian Otis, the daughter of Otis, two years after the passing of his first wife. They had a family with six children and also raised two daughters from Harry's previous marriage.