sentences:  The Guild's most conspicuous and enduring achievement was the creation of a remarkable collection of art, minerals, books, medieval manuscripts, architectural casts, coins and other precious and beautiful objects.Housed in a cottage museum high on a hill in the Sheffield district of Walkley, it opened in 1875, and was curated by Henry and Emily Swan.Ruskin had written in "Modern Painters" III (1856) that, "the greatest thing a human soul ever does in this world is to "see" something, and to tell what it "saw" in a plain way."