There was nothing else with it.
It's just a torn-off back cover of an old book. Even with the illustration of the boy and girl in a boat, it would take a miracle to figure out what book this is from.
Truly, it should just be tossed in the trash. (My wife is nodding yes).
But I reckon the illustration is interesting enough to post online for posterity before sending it off to the Great Book Beyond. Or putting it into the Drawer of Blogged-About Items, where it won't take up much space. (My wife is giving me a stern look.)