Originally, a small, sharp-built vessel, with two masts and fore-and-aft rig. Sometimes it carried square topsails on one or both masts and was called a topsail schooner. About 1840, longer vessels with three masts, fore-and-aft rigged, came into use, and since that time vessels with four masts and even with six masts, so rigged, are built. Schooners with more than two masts are designated three-masted schooners, four-masted schooners, etc. See Illustration in Appendix.