On the inside front cover.
Request for letters. Indicia at the bottom of the page.
Another request for letters.
Lower right hand corner includes two small advertisements. One advertisement was for a Rare Afghanistan Stamp from the Penn Stamp Co. and the other advertisement was for Pulvex Flea Powder promoting that it contains Dichlorodiphenyltrichloroethane (DDT).
JCA stands for the Jason Comic Art studio.
Writing credit from Martin O'Hearn at http://martinohearn.blogspot.com/2019/05/mickey-klar-markss-zany-giraffe.h….
Title is from Marks's papers, archived at University of Southern Mississippi.