Curtis has quite a few tattoos for a man only about twenty-three years of age. Actually Curtis might have been at sea for a number of years as statements from seamen as young as fourteen appear in these records. 1807 probably was not his first year on the boat.
It took me a few seconds to determine that the first tattoo underlined here probably referred to an "Eagle on the Right arm."
I. C. and B. C. may have something to do with his last name, but I'm not certain. He also had his name tattooed to him as well.
Unfortunately I don't have any relatives in these records and, if I did, their descriptions would not be nearly as interesting as this one.