We’ve obtained the material to make a lug sail for one of our bateaux. The historical references to bateau sails is split between square sails and lug sails, with a few more reference to square sails. I have also found a single reference to a sprit sail. I made a square sail which we have used for years. We’d like to make a lug sail to try it out.
I was looking through Ships and Seamanship: The Maritime Prints of J. J. Baugean by John Harland, Anapolis: Naval Institute Press, 2000. This is a collection of plates published in 1814 and 1819.
On page 73 is a plate with a good view of some simply rigged lug sails.