 The family called it " Nellie 's little book " and , when the book was published with twenty @-@ six colour pictures , the dedication remained the same . 25 @,@ 000 copies of The Tale of Mrs. Tittlemouse were released in July 1910 and available in a 138 by 104 millimetres ( 5 @.@ 4 in × 4 @.@ 1 in ) small book format in either blue @-@ grey or buff paper boards at 1 / - or decorated cloth at 1 / 6 . 10 @,@ 000 copies were released in November 1910 and another 5 @,@ 000 copies in November 1911 . Potter was pleased with the bound copies she received . " The buff is the prettiest colour , though it may not keep so clean " , she wrote to Warnes , " I think it should prove popular with little girls . " Her father wrote to the Warne children that his daughter 's sense of humour was ever @-@ fresh and never dull . 
