Question: Who was this American Founding Father, a proponent of democracy, republicanism, and individual rights, examined Ice Age fossils of Kentucky's Big Bone Lick?

Passages:
Jane's Saddlebag, located near Big Bone Lick State Park in Union, Kentucky, is a "hands on" historic educational experience, complete with the old restored "Saddlebag" home, 100-year-old mortise and tenon barn, original stone smokehouse, life size replica of a 1700s-style flatboat, and live farm animals in the petting zoo.  The Jane's Saddlebag house was completely refurbished in 2003 and maintains most of its original "saddlebag" style qualities. William Goforth (December 26, 1766 - May 12, 1817) was an American politician and physician in Ohio and Louisiana.  He administered the first smallpox vaccines and conferred the first medical degree in the frontier west, and was a delegate to write the first constitution of Louisiana.  He also excavated a large number of megafauna bones at Big Bone Lick in Kentucky. Kentucky Route 338 begins at Kentucky Route 20 in Northern Boone County.  It goes though Burlington, Kentucky where it intersects with Kentucky Route 18.  It then goes to a small town called Rabbit Hash, Kentucky where it intersects with Kentucky Route 536 and again with Route 18.  After it leaves Rabbit Hash, it runs by Big Bone Lick State Park before intersecting with US 42 and US 127 near Union.  It turns left onto US 42 and US 127, and then leaves the concurrency about mile north.  Route 338 then travels to Richwood, where it has access to Interstate 75 and Interstate 71 it ends about 1/4 mile east of the interstate at US 25. Thomas Jefferson (April 13 [O.S. April 2] 1743 – July 4, 1826) was an American Founding Father who was the principal author of the Declaration of Independence and later served as the third President of the United States from 1801 to 1809.  Previously, he was elected the second Vice President of the United States, serving under John Adams from 1797 to 1801.  A proponent of democracy, republicanism, and individual rights motivating American colonists to break from Great Britain and form a new nation, he produced formative documents and decisions at both the state and national level.  He was a land owner and farmer. Big Bone is an unincorporated community in southern Boone County, Kentucky, United States.  It is bounded on the west by the Ohio River, and Rabbit Hash, on the south by Big Bone Creek, which empties into the river at Big Bone Landing.  The northern extent is along Hathaway Road, and the eastern portion extends not further than U.S. 42, and is approached from that direction by Beaver Road (Route 338) coming from either Richwood or Walton.  Big Bone took its name from a nearby prehistoric mineral lick of the same name.  Geographical features of interest include the now disappeared Big Bone Island and the Palisades of Big Bone Creek. <P3-S0> Paleontology in Kentucky refers to paleontological research occurring within or conducted by people from the U.S. state of Kentucky. <P3-S1>  Kentucky's abundance of exposed sedimentary rock makes it an ideal source of fossils. <P3-S2>  The oldest exposed rocks in Kentucky are of Ordovician age. <P3-S3>  The geologic column of Kentucky also contains rocks deposited during the ensuing periods until the end of the Pennsylvanian. <P3-S4>  During this span of time the state was first home to a warm shallow sea home to an abundance and variety of brachiopods, cephalopods, crinoids, and trilobites. <P3-S5>  During the Devonian, a large reef system formed at what is now the Falls of the Ohio. <P3-S6>  Swamps covered Kentucky during the ensuing Carboniferous period. <P3-S7>  Then a gap spans from the start of the Permian to the Pleistocene, although the gap is interrupted by minor deposits of Cretaceous and Eocene rocks. <P3-S8>  These deposits mainly preserve plant fossils. <P3-S9>  Ice Age Kentucky was home to short-faced bear, bison, elk, lions, mammoths, mastodons, and giant ground sloths. <P3-S10>  Local Native Americans interpreted fossils of this age at Big Bone Lick as belonging to ancient monsters killed by benevolent mystical little people. <P3-S11>  This same fossil deposit would attract attention from major American figures like George Washington, Daniel Boone, and, especially, Thomas Jefferson. <P3-S12>  Amateur fossil collectors should be aware that they need permission from landowners to prospect legally on private property. <P3-S13>  Brachiopods are the Kentucky state fossil. <P0-S0> Big Bone Lick State Park is located at Big Bone in Boone County, Kentucky. <P0-S1>  The name of the park comes from the Pleistocene megafauna fossils found there. <P0-S2>  Mammoths are believed to have been drawn to this location by a salt lick deposited around sulphur springs. <P0-S3>  Other animals including forms of bison, caribou, deer, elk, horse, mastodon, moose, musk ox, peccary, sloth, and possibly tapir also grazed the vegetation and salty earth around the springs that the animals relied on for their diet. <P0-S4>  The area near the springs was very soft and marshy causing many animals to become stuck with no way to escape. <P0-S5>  It bills itself as "the birthplace of American paleontology", a term which dates from the 1807 expedition by William Clark undertaken at the direction of President Thomas Jefferson. <P0-S6>  In Nicholas Cresswell's journal, dated 1774 to 1777, he records a visit in 1775 to what was then called "Elephant Bone Lick." <P0-S7>  In this account, Cresswell describes finding several bones of "prodigious size", as well as tusk fragments, and teeth—one weighing approximately 10 pounds. <P0-S8>  While he assumed the bones were from ancient elephants, the local native traditions claimed the bones to be those of white buffaloes that had been poisoned by the salty water. Bone Lick was an unincorporated community located in Raleigh County, West Virginia.  Bone Lick had a Post Office in 1935. The history of paleontology in the United States refers to the developments and discoveries regarding fossils found within or by people from the United States of America.  Local paleontology began informally with Native Americans, who have been familiar with fossils for thousands of years.  They both told myths about them and applied them to practical purposes.  African slaves also contributed their knowledge; the first reasonably accurate recorded identification of vertebrate fossils in the new world was made by slaves on a South Carolina plantation who recognized the elephant affinities of mammoth molars uncovered there in 1725.  The first major fossil discovery to attract the attention of formally trained scientists were the Ice Age fossils of Kentucky's Big Bone Lick.  These fossils were studied by eminent intellectuals like France's George Cuvier and local statesmen and frontiersman like Daniel Boone, Benjamin Franklin, William Henry Harrison, Thomas Jefferson, and George Washington.  By the end of the 18th century possible dinosaur fossils had already been found. East Bend is a region of Boone County, Kentucky, about 20 miles southwest of Cincinnati, Ohio.  The region is well named; there the Ohio River makes an almost right angle turn, and flows east for ten miles or more.  On the Kentucky side of the river, the land is mostly bottom land and good farm land.  Points on interest are the river towns of Belleville, Mcville, Rabbit Hash, Piatt's Landing and Hamilton.  There is a salt spring at Big Bone Lick where mastodon and buffalo bones have been found.

Supporting sentences:
Thomas Jefferson (April 13 [O.S. April 2] 1743 – July 4, 1826) was an American Founding Father who was the principal author of the Declaration of Independence and later served as the third President of the United States from 1801 to 1809.  A proponent of democracy, republicanism, and individual rights motivating American colonists to break from Great Britain and form a new nation, he produced formative documents and decisions at both the state and national level.