US National Archives
Nara: Founding Fathers: Delegates to the Constitutional Convention
The National Archives and Records Administration (NARA) provides biographies of all 55 delegates to the Constitutional Convention.
US Army Center
U.s. Army Center of Military History: Daniel of St. Thomas Jenifer
A short but detailed biography on this delegate to the Constitutional Convention from Maryland. He was a good friend of George Washington.
Other
Digital Maryland: Letter From Daniel St. Thomas Jenifer to Johnson 1788
This is a file of an actual letter written by Daniel St. Thomas Jenifer to the governor of Maryland, Thomas Johnson. The letter is dated Nov. 11, 1788 and is three pages long. Some notes on the letter are also provided.
Other
Concord Learning Systems: Daniel of St. Thomas Jenifer
A short account of the life of Maryland delegate to the Constitutional Convention, Daniel of St. Thomas Jenifer.
US National Archives
Nara: Founding Fathers: Maryland
Gives biographical details on the five delegates from Maryland to the Constitutional Convention: Daniel Carroll, Daniel of St. Thomas Jenifer, Luther Martin, James McHenry, and John Francis Mercer.