Hi Tom
On Newspapers.com I located a newspaper - Public Ledger Philadelphia, PA published 1836 - 1861. The ship sailed about once a year to Philadelphia in 1838, 1840 - 1843, 1845 - 1848. No voyages in 1839 or 1844. I could not find any record of a mutiny on board the "Champlain" but other mutiny's did occur. I found only a record of a man arrested for smuggling see attachment. Note the attachment is dark. Date June 23, 1840 also see 3 other attachments one an advertisement for the ship and two reports of damage.
Tim