Till'- Maul of Kkuuy — Lansdmvnc Maps of Uio Down Harvey. 887 



Tlie survoy, it will be remeiubenid, was Ciuri(.'(l out in two distinct 

 parts: — 



Ist. The "admeasurement" oF those counties or parts of counties which 

 were set aside for the satisfaction of the Cromwellian soldiery, and were 

 nuipped under the articles of agreement made between the Surveyor-General 

 (Worsley) and Petty, dated December 11, 1654.' 



2nd. That of the lands surveyed for the payment of the "Adventurers" 

 under the Order in Council of September 3, 1656.2 



It will be found that the Lansdowne volumes A to E all relanc to the 

 first section,' and that the maps therein bear the date 1655-6, while volume F 

 contains a part of the lands surveyed under the second instrument, its maps 

 being dated 1657 to 1659. 



There can, therefore, be little doubt that the volumes were compiled 

 between 1655 and 1659, while the sur\ey was actually in progress, and that 

 the maps were inserted in their places as soon as they came Lo hand from 

 the surveyors engaged in the work. 



But perhaps the strongest, as also the mo.st interesting, evidence of the 

 authenticity of the Lansdowne maps is to be fouiul in the maps themselves. 

 As is generally known, there are in the Bibliothei|ue Nationale at Paris two 

 large volumes of these barony maps, which, thougli long r-ecognized as copies, 

 are important as constituting the only complete set in existence.* They 

 comprise all the baronies of Ireland (215), except those of itoscommon, 

 Galway, and parts of Clare and Mayo, which counties having been surveyed 

 under Strafford's administration, and afterwards reserved for the trans- 

 planted Irish, were not dealt with in the Down Survey. 



Now, while the Lansdowne maps were at the British Museum for the 

 purpose of being cleaned and mounted, it was discovered by Mr. Chubb, of 

 the Map Department, that, most of them bore the intlentations of a tracing 

 instrument, the course of which, with the help of a nuignifying glass, could 

 be easily followed upon the paper. It was observed, moreover, that in many 

 places (as might be expected) the line of the trace deviated from the true 

 line of tiie map. Photographic reproductions of the Paris maps were then 

 compared with the Lansdowne series, and it was found that the former in 

 every case reproduced the line of the trace and not the true line of the 

 latter. The source of the Paris maps is, therefore, explained, and, since 

 they were copied from the Lansdowne volumes, the obvious inference is that 

 these latter were considered at the time I he original and autlientic source 

 for this purpose. 



' History of the Down Survey, p. 23. ^ History, pp. 137-142. 



- History, p. 390. ■• Hnrdinge, pp. 32, 33. 



[50*] 



