A portable magnetometer of the Null type.

Ordnance survey :

abstracts of the principal lines of spirit levelling in England and Wales. /

Louth letters :

one vol. containing information relative to the antiquities of the county, collected during the progress of the Ordnance Survey in 1835-36.

Catalogue of maps and plans and other publications to 1 Jan., 1893, Southampton.

Letters containing information relative to the antiquities of the County of Fermanagh collected during the progress of the Ordnance Survey in 1834-5.

Ordnance survey of Jerusalem /

The second geodetic levelling of England & Wales, 1912-1921 /

Account of the methods and processes adopted for the production of the maps of the Ordnance Survey of the United Kingdom, drawn up by officers of Royal Engineers employed under Lieut.-General Sir Henry James /

Letters containing information relative to the antiquities of the County of Meath :

collected during the progress of the Ordnance Survey in 1836.

Letters containing information relative to the antiquities of the County of Wexford :

collected during the progress of the Ordnance Survey in 1840.

Professional papers.

Ordnance Survey Road Map of Dublin

Letters containing information relative to the antiquities of the County of Westmeath :

collected during the progress of the Ordnance Survey in 1837.

Trench Map :

Belgium.

An outline of the history and revision of 25-inch Ordnance survey plans /

Letters containing information relative to the antiquities of the County of Down collected during the progress of the Ordnance Survey in 1834.

Letters and extracts relative to anicent territories in Thomond, 1841. :

Ordnance Survey.

Map of XVII century England

Ordnance Survey map of Roman Britain

Letters containing information relative to the antiquities of the County of Kildare collected during the progress of the Ordnance Survey in 1837 :

reproduced under the direction of Rev. Michael O'Flanagan.