グーテンベルク聖書
One of the most significant transactions of Wells' career was his purchase of a Gutenberg Bible from Joseph Sabin, who had bought it at auction in 1920. The two-volume work (one of 41 in existence) was not in perfect condition – it was missing 50 of its 643 leaves and some of those that remained had their illuminations cut out. Wells opted to break up the Bible and sell the leaves individually, thus reaching a wider market. The leaves in perfect or good condition sold for an average of $150 each (approximately $1,500 today), while the ruined leaves were priced around $100. Each leaf was elegantly slip-cased in a "black or dark blue morocco goatskin portfolio folder" with the words "A Leaf of the Gutenberg Bible (1450–1455)" embossed on the cover in gilt lettering. Wells commissioned A. Edward Newton to write a five-page essay, "A Noble Fragment, Being a Leaf of the Gutenberg Bible (1450-1455)", which was included with each sale. Wells' decision to sell the leaves individually allowed major institutions and universities to purchase pages that they were missing from their own editions of the Gutenberg Bible. Wells gifted the New York Public Library with all but one of the leaves that it was missing from its collection.