My research interests concern the evolution and history of landscapes. This has involved paleobotanical and geological investigations in the rocks of the Late Devonian Period - a time when the earliest forests were spreading, seed plants evolved, and fish developed limbs and were entering new habitats.

This interest in landscapes has also focused on three small watersheds of southeastern Pennsylvania and their natural and cultural history. I have posted here online books on aspects of the Chester, Ridley, and Crum Creeks.

Also included here is material related to librarianship, which has been my paid work. My career has been one in which I help people connect with both their inner and outer landscapes.