An exact chart of the river St. Laurence : from Fort Frontenac to the island of Anticosti shewing the soundings, rocks, shoals & c with views of the lands and all necessary instructions for navigating that river to Quebec / by ... Thos. Jefferys.Jefferys, Thomas, d. 177125 May, 1775.Appears in Thomas Kitchin's General atlas describing the whole universe.IncMounted on linen. Sheet measures 64.4 x 101 cm. Cross Collection no. 176.Relief shown pictorially. Soundings shown in fathoms.With dedication to John Montagu, Earl of Sandwich.cartographic