Maryland Historical Society
Additional information at http://www.worldcat.org/title/calvert-papers-calendar-and-guide-to-the-microfilm-edition/oclc/20724791 and https://maryland-historical-society.shoplightspeed.com/maryland-historical-society-calvert-papers.html
The papers (1584-1805) of the Calvert family, Lords and Proprietors of the Colony of Maryland, consist of both family papers and those that concern the Calverts’ colonial interests. For Maryland, the papers are divided into land, financial, and government categories. The earliest papers include documents relating to the Arundel family, which joined with the Calverts through marriage in 1628.
In addition to the original guide there is an amplified finding aid, The Calvert Papers: Calendar and Guide to the Microfilm Edition, which provides a more detailed description of these papers. It also contains a history of the Calvert Papers and a diagram showing the relationships of prominent members of the Calvert family in the colonial period.
27 reels, 32-page original guide (1973), separately published 202-page guide, The Calvert Papers: Calendar and Guide to the Microfilm Edition (1989).