To His Most Excellent Majesty King William IVth this Topographical Map of the District of Montréal, Lower Canada, Exhibiting the New Civil Division of the District into Counties pursuant to a recent Act of the Provincial Legislature ; also a large section of Upper Canada, traversed / by the Rideau Canal. Is with His Majesty's Gracious and Special Permission most humbly and gratefully dedicated by... Joseph Bouchette, His Majesty's Surveyor General of the Province... Scale of Miles 16148 ; 1 : 174 000 environ ; Engraved by J. & C. Walker