This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Correspondence Hilgard Theodore to Engelmann George Oct verso BHL. Correspondence Hilgard Theodore to Engelmann George Oct verso Illustration Hilgard Theodore to Engelmann biodiversitylibrary org Hilgard Theod Permission to digitize granted by rights holder Biodiversity Heritage Library Check categories October PDold