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Important Mason-Dixon Manuscript Map & Related Documents | October 29, 2026

Thu, Oct 29, 2026 10:00AM EDT
  2026-10-29 10:00:00 2026-10-29 10:00:00 America/New_York Brunk Auctions Brunk Auctions : Important Mason-Dixon Manuscript Map & Related Documents | October 29, 2026 https://live.brunkauctions.com/auctions/brunk/important-mason-dixon-manuscript-map-related-documents-october-29-2026-24252
Brunk Auctions is honored to present an exceptional and historic piece of American cartography, the original manuscript map outlining the borders between Maryland and Pennsylvania. Drawn between 1767 and 1768 by Charles Mason (1728-1786) and Jeremiah Dixon (d.1777), the Mason-Dixon line is the symbolic boundary between Northern and Southern states. Originally owned by Benjamin Chew (1722-1810), the Chief Justice of Pennsylvania, it was subsequently owned by publishing magnate Malcolm Forbes. It will be offered alongside other maps and manuscripts critical in justifying the Mason-Dixon survey.
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Lot 3

Calvert, Franklin - Articles of Agreement..., with Framed Map of Maryland, Pensilvania [sic], and part of Virginia

Estimate: $60,000 - $80,000
Starting Bid
$30,000

Bid Increments

Price Bid Increment
$0 $25
$100 $50
$1,000 $100
$2,000 $200
$3,000 $250
$5,000 $500
$10,000 $1,000
$20,000 $2,000
$50,000 $5,000
$100,000 $10,000

Articles of Agreement Made and Concluded Upon Between the Right Honourable the Lord Proprietary of Maryland and the Honourable the Proprietarys [sic] of Pensilvania, [sic] &c. Touching the Limits and Boundaries of the Two Provinces. With The Commission, Constituting certain Persons to execute the same, by Charles Calvert, Third Baron Baltimore, printed by Benjamin Franklin, Philadelphia, 1733, 18 pp., printed wraps, watermarked laid paper, 12-7/8 x 8-1/4 in., folding map has been removed and framed separately; uncolored woodcut map on laid paper, sheet 16-3/8 x 12-3/4 in.; modern parcel gilt frame, 26 x 22-3/8 x 1-1/2 in.

Provenance: Sessler's Bookshop, Philadelphia, Pennsylvania (accompanied by write up); Christie's, New York, NY, "Printed Books and Manuscripts", December 19, 2002, lot 213 (tag); Private Collection

Note: Following decades of unsuccessful attempts to resolve the exact location of the boundary between Maryland and Pennsylvania, Lord Baltimore petitioned the king to order the Penns to settle the border dispute. Attempting to avoid additional legal expenses, the proprietors of both colonies agreed to meet in London to reach a private settlement with London lawyer and colonial agent Ferdinando John Paris serving as mediator. In order to establish the boundaries, each of the proprietors submitted a map for reference. At Lord Baltimore’s insistence, his erroneous map (lot 1, Visscher) illustrating Cape Henlopen 25 miles

below its true location, was used to as a guide determine the southern boundary of the three lower counties on the Delmarva Peninsula. The map was delivered to London cartographer John Senex to be engraved on copper. Three manuscript documents, penned on vellum outlining the terms of the agreement and containing the Senex map as an inset, were distributed to each of the proprietors.

One of Thomas Penn’s copies of the agreement was given to Benjamin

Franklin from which he printed 500 copies in pamphlet form, each accompanied by a woodcut version of the inset map by Senex. It has been suggested that Franklin himself, who had experience making woodcuts for printing, may have copied the London map. This is the first map printed in the English colonies south of New York. Despite the fact that Franklin printed 500 copies of the agreement, today they are exceedingly rare.

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Sessler's Bookshop, Philadelphia, Pennsylvania (accompanied by write up); Christie's, New York, NY, "Printed Books and Manuscripts", December 19, 2002, lot 213 (tag); Private Collection

pamphlet with professional restoration and conservation throughout, particularly along edges, library stamp and label and previous owners' inscriptions to title page, library stamp to pp. 3 and 15 (commission title page), lacking final leaf/p. 19, toning and areas of foxing throughout, repaired closed tears, small chips, and losses along edges, creasing throughout, remains of binding threads removed during conservation retained, housed in custom clamshell with some discoloration to cloth and front labelï¼› map floated on acid free board preventing inspection of verso, paper with toning, creasing, and scattered foxing, areas of discoloration and handling smudges particularly along right edge, a few very small losses along fold lines reinforced at back with other areas of likely conservation not visible from recto Note - Brunk Auctions makes every effort to offer accurate and thorough information, but encourages prospective bidders to inspect items in person whenever possible. Condition statements are provided as a courtesy for general guidance and should not be considered complete or definitive. They do not represent a warranty or assumption of liability by Brunk Auctions. Certain condition issues may not be specifically noted in the report but may be visible in the accompanying photographs, which are considered part of the overall condition report. Please refer to our Terms of Sale for complete information and contact us for additional photos or information as needed.