Sheldon published the fourteen book Rollo Series in numerous different formats between 1860 and the late 1870's. Between 1860-1864 two different Rollo sets were published and the books were sold mostly just by the set: An 18 mo. cheaper edition and a 16 mo. more expensive book. The larger 1860 book had the identical format as the last Phillips, Sampson and Company

Here is the smaller, cheaper 1860 book.

1860 (6.25 x 4)

1860 (6.75 x 4.5) Same as the Phillips, Sampson and Co. format

In 1861-1863 the smaller book had a new format.

1864 (6.75 x 4.5) Format unchanged from the 1860 book

In 1864 and early 1865 the the cover decoration was changed very slightly.

1865

1866

1867 edition

1868

1868

1872

Several undated Sheldon Rollo books have seen. These all have the same address on the title page: 677 Broadway. Sheldon was at this address between 1871 and 1875.

Two books have been seen with Sheldon's No. 8 Murray Street address. Sheldon was there between 1876 and 1884. The purple cover book is dated 1877. The exact date of publication of the undated blue cover book is unknown.