The trousers--for these I used a pre-existing costume pattern which I deemed to actually be authentic looking. I just had to size it down since.
I started out by basting the piping to the front sections. Technically, this pair of trousers really should have had 1"-2" trim down the sides, but I went with piping because--hmm. I used the excuse of "it takes less material" but now I'm not sure. Piping is cut on the bias, so I got over 200" of piping out of roughly 3/4 of yard.
At anyrate, I had seen period photographs where the pants had piping rather than wide trim down the legs.
As it turns out, the hem was hidden the most of the time--either in Andrew's boots--or in his socks! :D