This is a correct tracing from a portion of a large Map of Oregon Territory, which
                        extends from 42' to 49' N. Lat. & from about 121 15' to 124 40'W. Long. The boundary
                        line is Engraved or Lithogd precisely as it is here traced, commencing at mid-chanl
                        on the 49th Parallel - & extends S.& W. thro Vancouver & De Fuca Straits - John Arrowsmith,
                        105 Tho(?) Square, 8th Octr 1856. The original is -----
                      
                  Creston, B., 
San Juan Water Boundary (Arbitration) : list of maps sent to Admiral Prevost at Berlin
                        on the 12th June 1872 [map 30], 1852, Surveyor General's Office, Oregon City, FO 925/1650. 
The Colonial Despatches of Vancouver Island and British Columbia 1846-1871, Edition 2.5, ed. James Hendrickson and the Colonial Despatches project. Victoria,
                     B.C.: University of Victoria. 
https://bcgenesis.uvic.ca/fo_925-1650_pt_2_30_oregon_territory_nw_1852.html.
                     
 
                  
                     
                     Title: San Juan Water Boundary (Arbitration) : list of maps sent to Admiral Prevost
                        at Berlin on the 12th June 1872 [map 30]
                     
                     Title: Diagram of a portion of Oregon Territory
                     
                     Author: Creston, B.
                     
                     Subject: Washington (State)--Maps
                     
                     Identifier (repository): FO
                     
                     Identifier (repoNumber): 925
                     
                     Identifier (repoVol): 1650
                     
                     Identifier (libFileName): FO925-1650 pt2 (30)
                     
                     Identifier (penfoldNum): 
                     
                     Identifier (doc_id): FO 925/1650
                     
                     Date: 1852
                     
                     Funder: Funded by a Canadian Council of Archives, Archival Community Digitization
                        Program.
                     
                     Publisher: Surveyor General's Office, Oregon City
                     
                     Publisher: National Archives of the UK.
                     
                     
                     49 00'N--47 00'N / 124 00'W--122 00'W