How much? He mapped about 4 million sq/kms more than any other person. How many voyages depends. He seemed to be always on the move between 1797 and 1814 and even after that. He traveled from coast to coast at a time when few people had any idea what was west of the Mississippi.
David Thompson was born on April 30, 1770.
David Eugene Thompson was born in 1854.
David Eugene Thompson died in 1942.
David M. Thompson was born in 1950.
David B. Thompson was born in 1923.
David R. Thompson was born in 1930.
David Thompson - entrepreneur - was born in 1936.
David R. Thompson died in 2011.
David Richard Thompson goes by Da'ud.
david thompsons dad was david thompson.david thompson was named after his dad , his true name is john
David Thompson's Employers were the Hudson's bay Company around 1786
David H. Thompson died on 1957-05-20.