I managed to get an original library copy of Lawrence Griswold's book
"Tombs, Travel and Trouble" and read it.
It was written in the 1930's style of adventure books, somewhat similar
to Frank Buck's books which I have read, also some of Richard Halliburton.
Mr. Griswold always travelled with partners, a crew, and local men, never any women.
The book was about his adventures in locating lost cities in Central
and South America, living with the Amazon indians, exploring the Philippines,
then to the Dutch East Indies to capture Komodo Dragon lizards for a zoo in New York.
And he takes time off to hunt tigers.
He provides little details on his personal life except that he went to
Harvard University at some time.
He gives directions for shrinking heads and for capturing giant lizards.
He seems to be a "snake magnet", encountering various dangerous snakes
wherever he goes.
Illustrations from the book:
I can not find any information on Mr. Griswold after he published the book,
and very little before, including when or where he was born, where he grew up,
and if he is still around.
He does not cover this adventure in his book, but he went to China to look for Pandas
around the same time (1930's).