Souris is a town in Kings County, Prince Edward Island, Canada. It is located near the northeastern tip of the province. Souris was founde…Souris is a town in Kings County, Prince Edward Island, Canada. It is located near the northeastern tip of the province. Souris was founded by Acadians in 1727 as a fishing settlement at the mouth of the Souris River. These early settlers experienced several plagues of field mice in the surrounding area during the 1720s-1760s which damaged crops. Souris is French for "mouse" and a mouse is the town's mascot. It is said that "a French vessel passing by the bay in the early 1700s was forced to cut through the waves of drowned mice and so gave the name to the area. The 1744 map of Sieur de la Roque names the bay, Havre a la Souris”. Earlier names also included: Colville Bay, Grand Haven, New Bristol, and Red Cliffs.