...nt lasted from March, 1845, until September, 1847, and then having satisfied himself that the thing could be done, he gave it up. Two years later, Thoreau published his first book, A Week on the Concord and Merrimack Rivers. The actual voyage was performed by the two brothers Henry and John in the late summer of 1839 in a boat of their own making, painted green below with a border of blue, with refe...