Complex sentence: Near the end of his life, Cooke donated his library to Selwyn College, Cambridge, which had been founded in 1882, giving the college a collection later described as "five thousand rare, valuable, and useful patristic, liturgical, and other works".
Split into simpler sentences: Near the end of his life, Cooke donated his library to Selwyn College, Cambridge, which had been founded in 1882. This was later described as "five thousand rare, valuable, and useful patristic, liturgical, and other works".