Clark writes his brother Jonathan from Big Bone Lick, Kentucky, while conducting a major archaeological fossil dig at Thomas Jefferson's request. He describes what has been unearthed so far and mentions their brother George Rogers Clark being drunk but "more thoughtfull to day."
"Travels through the western interior of the United States, from the year 1808 up to the year 1816: with a particular description of a great part of Mexico, or New-Spain. Containing a particular account of thirteen different tribes of Indians through which the author passed, describing their manners, customs, &c., with some account of a tribe whose customs are similar to those of the ancient Welsh."