Map is a photographic reproduction of a portion of a sheet held at the Public Records Office, London.
From PRO record:
Sheet is one of 12 unnumbered sheets of paper, each bearing a title; (listed under the item numbers of the maps to which they relate) are as follows: (4) 'Sketch of First Reconnaissance'; (5) 'Sketch of Second Reconnaissance'; (6) 'Sketch of Third Reconnaissance'; (7) 'Sketch of Fourth Reconnaissance'; (8) 'Sketch of Fifth Reconnaissance'; (9-10) 'General Map'; (11) 'First Reconnaissance 1874'; (12) 'Second Reconnaissance 1874'; (13) 'Third Reconnaissance 1874'; (14) 'Fourth & Fifth Reconnaissance 1874'; (15) 'Sixth & Seventh Reconnaissance 1874'.
PRO Maps related to these sheets:
Canada; United States of America. (4-8) Map, on 5 sheets, together showing a survey of land on either side of the international boundary from 107°W to the Red River. Scale: 1 inch to 4 miles [1:253,440]. [?Surveyed 1872-1873]. Items 4-6 and 8 traced by 2nd Corporal J H Lovell, Royal Engineers; item 7 traced by Sapper E McNichol, Royal Engineers. (9) 'Map of Part of the International Boundary Line under 2nd Art Convention of London 20th Oct. 1813 Surveyed in 1872 & 1873 by Her Majestys Boundary Commission ': covering the area between 107°W and the Lake of the Woods. Scale: 1:750,000. Traced by Lance-Corporal W H Wilson, Royal Engineers. (10) 'Map of Part of the International Boundary Line under 2nd Art Convention of London 20th Oct. 1813 Surveyed in 1874 by Her Majestys Boundary Commission ': covering the area between 114° and 106°W. Scale: 1:750,000. (11-15) Map, on 5 sheets, together showing a survey of land on either side of the international boundary covering the same area as shown on item 10. Scale: 1 inch to 4 miles [1:253,440]. Dated 1874.
