Declaration of Independence Signer, Continental Congressman, US Senator, United States Constitution Singer. Served as a Delegate from PA in the Continental Congress from 1775 to 1778. Signed the Declaration of Independence in 1776. Elected to the US Senate from PA, serving from 1789 to 1795. One of the richest men in America at the time of the Rebellion; known as the "Financier of the Revolution". His involvement in unsuccessful land speculation caused him to be imprisoned from debt from 1798 to 1801. His son Thomas Morris served as a Congressman from New York.