Here is an advertising flyer found today in a 1911-1912 Young People’s Library Format 3 book. This little two page flyer (6 x 3.25) is quite typical for the ads that Altemus placed in books for their publications. As I have noted before, I believe Altemus printed advertising flyers for most of its books/series. These pieces however are very difficult to find. The ones discovered so far are shown here: http://henryaltemus.com/flyers/flyers.htm.