The Royal Club Series by William Everett

Published by Lee and Shepard
1. Changing Base; or, What Edward Rice Learnt (Copyright 1868/ title page 1868)
2. Double Play; or, How Joe Hardy Chose His Friends (Copyright 1870/ title page 1871)

Double Play was released in December, 1870. It was advertised with Changing Base at that time but no series name was noted.

The first format of both books had blindstamping with the same gilt spine illustration. This format was noted with the first edition of Changing Base which was before the second book had been published. The format was unchanged until 1874.

Second format.
Cloth. Green and maroon seen. The cover has gilt lettering of the title within what appears to be a baseball diamond with two bats at second base. The spine has gilt lettering and design. Illustrated. 12 mo.