The actual strength of the corps on the survey on the 14th June, 1849, taken from a return presented to the Committee of the House of Commons on Army and Ordnance Expenditure,[[217]] is subjoined:—
| England. | |||
| Sergeants. | Bugl. | Rank and File. | |
| Head-quarter office-general work and computing | 0 | 2 | 38 |
| Principal triangulation | 2 | 0 | 28 |
| Inserting improvements, &c., in the 1-inch map. | 0 | 0 | 1 |
| Secondary and minor triangulation | 0 | 0 | 1 |
| Levelling and contouring | 1 | 0 | 9 |
| Six-inch survey and plan drawing of Yorkshire and Lancashire | 8 | 1 | 110 |
| Survey of London for sanitary purposes | 5 | 0 | 20 |
| Survey of Devonport for military purposes | 1 | 0 | 11 |
| Total | 17 | 3 | 218 |
| Head-quarter Stations.—Southampton, Wakefield, York, and Doncaster. | |||
| Scotland. | ||||
| Secondary and minor triangulation | 0 | 0 | 6 | |
| Six-inch survey and plan drawing of Kirkcudbright, Dumfries-shire, and the Isle of Lewis | } | 3 | 0 | 63 |
| Total | 3 | 0 | 69 | |
| Head-quarter Stations.—Dumfries, Stornoway. | ||||
| Ireland. | |||
| Plan drawing, printing, workshops | 1 | 1 | 5 |
| Contouring Donegal | 0 | 0 | 3 |
| Revising Donegal and Londonderry | 3 | 0 | 15 |
| Total | 4 | 1 | 23 |
| General Total | 24 | 4 | 310[[218]] |
| Head-quarter Stations.—Dublin and Londonderry. | |||
The survey strength and distribution on the 17th October, 1856, the date of changing the designation of the corps, were as follows:—
England.
| Quarter-master. | Staff-sergeants. | Sergeants. | Bugl. | Rank and File. | ||||
| Head-quarter Office, Southampton. |  | Drawing, computing, tracing,printing, &c. |  | 1 | 2 | 2 | 4 | 32 |
| Ditto. | | Detached, levelling, and contouring | | 0 | 0 | 0 | 0 | 4 |
| Ditto. | | Ditto, secondary and minor triangulation | | 0 | 0 | 2 | 0 | 14 |
| Carlisle | | Detail surveying and drawing plans | 0 | 0 | 2 | 0 | 22 | |
| Levelling and contouring | 0 | 0 | 2 | 0 | 13 | |||
| Newcastle | Detail surveying and drawing plans | 0 | 0 | 2 | 0 | 27 | ||
| Darlington | Ditto ditto ditto | 0 | 0 | 2 | 1 | 28 | ||
| Total | 1 | 2 | 12 | 5 | 140 | |||
Scotland.
| Quarter-master. | Staff-sergeants. | Sergeants. | Bugl. | Rank and File. | ||||
| Edinburgh | | Levelling and contouring | 0 | 0 | 2 | 0 | 13 | |
| Detail surveying and drawing plans | 0 | 0 | 1 | 0 | 33 | |||
| Glasgow | Ditto ditto ditto | 0 | 0 | 2 | 0 | 28 | ||
| Dumfries | Ditto ditto ditto | 0 | 0 | 1 | 0 | 31 | ||
| Ayr | Ditto ditto ditto | 0 | 0 | 2 | 0 | 36 | ||
| Kelso | Ditto ditto ditto | 0 | 0 | 1 | 0 | 32 | ||
| Harris Isles | Ditto ditto ditto | 0 | 0 | 0 | 0 | 4 | ||
| Total | 0 | 0 | 9 | 0 | 177 | |||
Ireland.