More about archives and how to use them:
What is an archive? What is a finding aid? (Houghton Library)
More information about text in the images in the Spotlight session:
More images like the ones in the Spotlight session:
More information about Cambridge Common:
Aerial photograph of Cambridge Common, 1995 https://digitalcollections.library.harvard.edu/catalog/8000904652_urn-3:GSD.LOEB:15295844
Massachusetts Before and After Compare orthos from the 1990s with the 2019 vintage https://arcg.is/SGj0m (search Cambridge Common, 1667 Massachusetts Ave, Cambridge, MA, 02138, USA, then zoom in)
City of Cambridge information about Cambridge Common (16 acres) https://www.cambridgema.gov/CDD/parks/parksinfo/Parks/cambridgecommon.aspx