Frank Cheyne Papé was an English illustrator active in the early 20th century. He worked in both monochrome and color. His style varied from naturalistic to fantastic to comic, and he sometimes mixed those approaches within a series of illustrations for a single volume.
Papé is not as well known as many of his contemporaries who worked in the latter part of the time known as the “golden age” of illustration, and little is known of his life.
There are some resources online for his work, and there are reprints of books he illustrated currently in print as well as available from used book sources.
The best bio I can find is the one by Jim Vadeboncoeur Jr. on his JVJ Publishing resource about illustrators.