 The business continued to prosper and Cole eventually opened various new departments including one of printing.He compiled a large number of popular books, of which the Cole's Funny Picture Book series, which was launched with great publicity on Christmas Eve 1879, and "Cole's Fun Doctor" were most successful, their sales running into many hundreds of thousands.Another publication (early 1900s) was "Cole's Treasury of Song, A Collection of the Most Popular Songs [Old and New]" containing about a thousand songs.