International Maritime Dictionary, by Rene de Kerchove, 1961, pg. 98. "Brigantine. 1. A brig without a square mainsail, for example, a vessel that carries all the square sails of a brig on both the fore- and mainmasts with the exception of the main course. 2 .... nowadays more usually refers to a two-masted vessel with square rig on the foremast and fore-and-aft rig (no top) on the mainsail."