Question: Benjamin Vaughan helped draft the treaty signed on what date?

Context paragraphs:
Saavedra Lamas Treaty: The Anti-war Treaty of Non-aggression and Conciliation (also known as Saavedra Lamas Treaty) was an inter-American treaty signed in Rio de Janeiro on October 10, 1933.  It was the brain-child of Carlos Saavedra Lamas, who was Argentinian Minister of Foreign Affairs at the time the treaty was concluded.  It was signed by representatives of Argentina, Brazil, Chile, Mexico, Paraguay and Uruguay.  The US government acceded to the treaty on August 10, 1934.  The treaty went into effect on November 13, 1935.  It was registered in "League of Nations Treaty Series" on November 28, 1935.

Thomas Badger: Thomas Badger (1792–1868) was an artist in Boston, Massachusetts, in the 19th-century.  He specialized in portraits.  He trained with John Ritto Penniman.  Portrait subjects included: John Abbot; William Allen, of Bowdoin College; Asa Clapp; Julia Margaretta Dearborn; George B. Doane; Henry Wadsworth Longfellow; Benjamin Page; Thomas Paul, of Boston's African Meeting House; Jotham Sewall; Benjamin Vaughan; Charles Vaughan; Frances Western Apthorp Vaughan; George Wadsworth Wells; Jonathan Winship.  Around 1849 a still life by Badger in the collection of the Boston Museum was considered "a highly finished and excellent picture, something in the style of Van Huysom.  There is a truth and reality in the articles represented, seldom seen in this class of pictures."

Benji Vaughan: Benjamin Vaughan, better known as Benji Vaughan, is a British psychedelic trance and psybient musician.  He has released music under many names, of which most well known is his solo project, Prometheus, and his collaboration with Twisted Records label colleague, Simon Posford, under the moniker Younger Brother.  His music is characterized by distinct basslines, high production quality, intense thematic development and unique or alternative approaches to the psytrance genre.  He frequently combines diatonic melodic content with metallic or "glitchy" percussive polyphonic elements to form thick contrapuntal tapestries of sound.  Although much of his music sounds like it was composed using equipment at the forefront of technology, it is not uncommon for him to use equipment now considered antique, such as the 1971 Korg micro synth that he used for portions of the second album, "Corridor of Mirrors".

Anglo-Egyptian treaty of 1936: The Anglo-Egyptian Treaty of 1936 (officially, "The Treaty of Alliance Between His Majesty, in Respect of the United Kingdom, and His Majesty, the King of Egypt") was a treaty signed between the United Kingdom and the Kingdom of Egypt.  Under the terms of the treaty, the United Kingdom was required to withdraw all its troops from Egypt, except those necessary to protect the Suez Canal and its surroundings, numbering 10,000 troops plus auxiliary personnel.  Additionally, the United Kingdom would supply and train Egypt's army and assist in its defence in case of war.  The treaty was to last for 20 years; it was negotiated in the Zaafarana palace, signed in London on 26 August 1936 and ratified on 22 December.  It was registered in "League of Nations Treaty Series" on 6 January 1937.

Benjamin Vaughan: Benjamin Vaughan MD LLD (19 April 1751 – 8 December 1835) was a British political radical.  He was a commissioner in the negotiations between Britain and the United States and the drafting of the Treaty of Paris.

Mallarino–Bidlack Treaty: The Mallarino–Bidlack Treaty (also known as the Bidlack Treaty and Treaty of New Granada) was a treaty signed between New Granada (today Colombia and Panama) and the United States, on December 12, 1846.  U.S. minister Benjamin Alden Bidlack negotiated the pact with New Granada's commissioner Manuel María Mallarino.

Treaty of Värälä: The Treaty of Värälä (sometimes known as the Treaty of Wereloe) was a treaty signed in Värälä, Elimäki Municipality, Finland, between Russia (represented by Otto Heinrich Igelström) and Sweden (represented by Gustaf Mauritz Armfelt).  It was signed on 14 August 1790 and concluded the Russo-Swedish War.  The treaty confirmed status quo ante bellum with respect to the borders, however Russia's right to interfere with Swedish interior affairs from the Treaty of Nystad was expressly revoked.  The provisions of the previous Treaty of Abo were basically confirmed.

Treaty of Paris (1783): The Treaty of Paris, signed in Paris by representatives of King George III of Great Britain and representatives of the United States of America on September 3, 1783, ended the American Revolutionary War.  The treaty set the boundaries between the British Empire in North America and the United States, on lines "exceedingly generous" to the latter.  Details included fishing rights and restoration of property and prisoners of war.

U.S.–German Peace Treaty (1921): The U.S.—German Peace Treaty is a peace treaty between the U.S. and German governments, signed in Berlin on August 25, 1921, in the aftermath of World War I.  The main reason for the conclusion of that treaty was the fact that the U.S. Senate did not consent to ratification of the multilateral peace treaty signed in Versailles, thus leading to a separate peace treaty.  Ratifications were exchanged in Berlin on November 11, 1921, and the treaty became effective on the same day.  The treaty was registered in "League of Nations Treaty Series" on August 12, 1922.

Westmount Collegiate Institute: Westmount Collegiate Institute is a high school in the Thornhill, Ontario district of the greater city of Vaughan.  It opened its doors in 1996, as part of the multi-purpose Benjamin Vaughan Complex, named for Benjamin Vaughan, the diplomat for which the city is named.  The complex contains the high school, Rosemount Community Centre, and the City Playhouse Theatre, to which the school is given limited access.  The school is part of the York Region District School Board.  Westmount is one of the 29 secondary schools in the board which comprises 191 schools altogether.  Westmount is known for its arts program and its strong academic program.  Many awards have been given to recognize the art, drama, dance, and music program known as ArtsWest.  Mathematics and the sciences were also recognized with York Regional awards.  The school is three levels with the first floor hosting many Arts classes and the gymnasium, the second floor is prevalent in languages, and the third floor has many y computer based classes, mathematics and sciences.

Supporting paragraphs: Benjamin Vaughan Treaty of Paris (1783)
Answer: September 3, 1783