Photograph of a hand holding a firefly above three heaps of fireflies on a table. Caption on back reads "Pressure between fingers separates tails from bodies."

Candid photograph of Spitzer at approximately 65 years old gesturing with his hand in his study.

Candid photograph of seven boys with a caption that reads "Lightning-bug project--kids bringing in the bugs."

Candid photograph of Page at approximately 45 years old smoking at a desk.

Candid photograph of McElroy working in a lab. The photograph has a caption on the back that reads "Solution is again evaporated and put on second column, which takes more impurities from luciferin."

Candid photograph of McElroy paying three boys for their fireflies.

Candid photograph of McElroy emptying a net of fireflies into a glass bowl.