Most of the 7 books which comprise the Dore Masterpieces Series have been found with advertising flyers within them. This was not uncommon for Altemus books in this era. I have seen Dore flyers in several different styles.

1. Single page one sided flyers. There exist single advertising sheets for The Rime of the Ancient Mariner and Idylls of the King. These are 10.5 x 6.

2. Single sheet – two sided ads. This ad includes the 6 Dore Masterpieces and has Bunyan’s Pilgrims Progress. This ad does not list the presentation editions and thus was from 1892 or later. They are 6.25 x 5.

3. Two 4 sided pamphlets have been seen. They list the same books-The Dore Bible Gallery, Paradise Lost, Dante’s Inferno and Dante’s Purgatory and Paradise. They both note the presentation editions. There are two differences: at the top of each page one says- NEW EDITION whereas the other states- ALTEMUS’ EDITION. The other difference is that the extra fine English Cloth books are priced at $4.00 in the former ads and $6.00 in the latter ads. Although one would assume that the higher price would signify a later date, there are no advertisements that ever showed the English Cloth book listed at $6.00. Thus, the ads can be assumed to be early in the publication history of these books but they cannot be dated precisely. Examples of pages are shown below.
        

4. One advertising flyer has been seen that has 8 panels. It includes all 7 of the Dore Masterpiece Books as well as Bunyan’s Pilgrim’s Progress. Interestingly, the heading at the top of each page says either “new edition” or “Altemus edition”. Books #1-4 are listed as Altemus Editions and they have the $6.00 price. Thus this flyer is of the same vintage as the ad #3 above that said Altemus Edition. The ads for The Rime of the Ancient Mariner and Idylls of the King are identical to the single sheet ads.