Altemus did not always make it easy to date their books. In fact, it can be downright confusing. Here is an example.

Description:
Vtg Through the Looking Glass Lewis Carroll Book 1897
is from the Altemus Young People’s Library series. I do not know if it is a first edition.

During the publication run of late Format 2 (and early Format 3) of the ubiquitous Young People’s Library (http://henryaltemus.com/ypl/index.htm) Altemus used a title page that noted the copyright date. This title page was used for several other series including the one to which this book belongs to. The only difference between books of the Boys and Girls Classics series and the Young People’s Library is the cover and the box that the book came in. This book is from Series #57-The Boys and Girls Classics Series.

In most instances when a publisher has a date on the title page it indicates the actual date of publication of that book and that is why most sellers get fooled by this Altemus title page date. Upon closer inspection Altemus is telling us when the book has the Altemus copyright. And of course the Altemus copyright is not necessarily the same as the date of publication.

The linen cloth cover seen here is part of a larger swatch of cloth that was used to cover some of the books of this series. http://henryaltemus.com/series/series57.htm
Publication dates were from 1908-1926. This cover was seen between 1908 and the early teens. The books also came boxed.