A brig is a type of sailing vessel defined by its rig: two masts which are both square-rigged. Brigs originated in the second half of the 18th century and were a common type of smaller merchant vessel
The South Shields collier brig Mary, painted by John Scott in 1855, showing two views of the same vessel. A Bentinck boom is fitted to the foot of the fore-course as a labour saving device when tacking.
A small trading brig entering the Bristol Avon, painted by Joseph Walter
Rimac, a brig built by Brocklebank in Whitehaven in 1834 for trade between Peru and Liverpool
In sailing, a snow, snaw or snauw is a square-rigged vessel with two masts, complemented by a snow- or trysail-mast stepped immediately abaft the main mast.
Brig
…Gun-brig Snow (ship) "Sailing Ship Rigs" Infosheet Guide to Classic Sailing Rigs Maritime Museum of the Atlantic Comparison of rigging on different sailing vessels…
1759 painting of a Royal Navy snow in two positions by Charles Brooking
The "snow-brig" USS Niagara (center) in 1913