I also found the following ...
"Congress adopted the ... Declaration of Independence, drafted by Thomas Jefferson, two days later, on July 4. The president of Congress, John Hancock, and its secretary, Charles Thompson, immediately signed the handwritten draft, which was dispatched to nearby printers. On July 19, Congress decided to produce a handwritten copy to bear all the delegates’ signatures. Secretary Thompson’s assistant, Philadelphia Quaker and merchant Timothy Matlack, penned the draft. ... which was signed on August 2, 1776.
http://www.history.com/this-day-in-history/delegates-sign-declaration-of-independence