I think it is 'Thee thous them as thous thee' but people seem to wax ungrammatical with thee and thou. (The latent English teacher in me.)
Q, the 'section line' was in effect in areas of the US being opened for settling/farming; roads were laid out in a one-mile grid. I grew up with section lines, as Oklahoma was only opened to settlement in the late 19th century. (Before that, it was by treaty to belong to the native tribes 'for as long as the grass shall grow and the rivers run' which turned out to be fifty years.)