Origin of square sail
Examples from the Web for square sail
Half an hour later the wind had gone round far enough for the square-sail to be used to advantage, and it was accordingly hoisted.The Queen's Cup|G. A. Henty
We hoisted our square-sail and wet our other sails, but the schooner gained upon us rapidly.Jack in the Forecastle|John Sherburne Sleeper
The term is applied to any fore-and-aft vessels setting a square-sail, flying, below the lower cross-trees.
Is full schooner-rigged, but carries a square-topsail on the fore-mast; the fore-sail not bent, but set as a square-sail.
When round, they came again upon even terms, as 'Livonia' had to luff and to lower her square-sail.Yachting Vol. 1|Various.