"Don Sturdy in the tombs of gold; or, The old Egyptian's great secret" by Victor Appleton. Published by Good Press. Good Press publishes a wide range of titles

This popular juvenile adventure series provided an escape, particularly this story set during the War in which Tom invents a huge airship designed for military

Tom receives a message from his missionary friend which describes a wonderful lost city, filled with treasures of gold, somewhere deep in the heart of Mexico.