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Theodolite used for the Principal Triangulation of Great Britain

1791

Brass framed sextant.

1790-1800

Circular protractor, British, 1800-1819

1800-1819

Portrait of Wildman Whitehouse, 1856-1865

1856-1865

Caricature. Montgolfier in the Clouds. Constructing of air balloon for the Grand Monarque

1784

Sextant by Jesse Ramsden with case

1770-1775

Pocket brass framed sextant

1785-1795

Metal clamp from the 3-foot geodetic theodolite

1791

Mahogany keystone box

1785-1795

Metal clamp from the 3-foot geodetic theodolite

1791

Screw and nut associated with the 3-foot geodetic theodolite

1791

Eight brass screws from the 3-foot geodetic theodolite

1791

Hand-held Asterioscope in brass mount in red leather morocco case, by Murray and Heath, 43 Piccadilly, London, England, 1850-1880. Consists of fine diffraction grating rulings on glass in rotating frame, thought to be an optical toy in the manner of the kaleidoscope.

Asterioscope in leather case

1850-1880

Adjustment handle, lamp hood and lens cover. Part of the three-foot geodetic theodolite, sometimes called the ‘great Theodolite’, used for the Principal Triangulation of Great Britain. Made by Jesse Ramsden, Piccadilly, London, 1791.

Adjustment handle, lamp hood and lens cover from the 3-foot geodetic theodolite

1791

Billy can, from "En Route" set made by Drew & Sons, Piccadilly. Patent no 281332.

En Route billy can

1890

Spirit lamp, from "En Route" set made by Drew & Sons, Piccadilly. Screw cap over wick. No fuel.

En Route spirit lamp

1890

Sugar tin, from "En Route" set made by Drew & Sons, Piccadilly. Push on lid; oval; enamelled brass liner inside.

En Route oval sugar tin

1890

Lunch basket, "En Route" made by Drew & Sons, Piccadilly, wicker basket for tea making set, with three compartments. Reg no. 121219. With seperate leather handle.Overall (closed): 256 mm x 345 mm x 175 mm.

En Route lunch basket

1890-1910

Sugar canister for Drew & Sons "En Route" Tea Basket, c1890. Overall: 63 mm x 65 mm x 57 mm.

Sugar canister for lunch basket

1890-1910

Oil canister, white metal, for Drew & Sons "En Route" Tea Basket, c1890. Overall: 60 mm x 90 mm.

White metal oIl canister, En Route lunch basket

1890-1910

Stand for kettle/pan when heating with oil burner, white metal, from Drew & Sons "En Route" Tea Basket, c1890. Overall: 150 mm x 132 mm x 101 mm.

Kettle stand for En Route lunch basket

1890-1910

Lunch basket, "En Route" made by Drew & Sons, Piccadilly, wicker basket containing equipment for making tea. Date around 1890.

En Route lunch basket

1890

Lunch basket, "En Route" made by Drew & Sons, Piccadilly, wicker basket for tea making set. Reg no. 121219.

En Route lunch basket

1890

Square canister, from "En Route" set made by Drew & Sons, Piccadilly. Hinged lid.

En Route square canister

1890

Stand for burner and kettle, from "En Route" set made by Drew & Sons, Piccadilly. Pierced design around waist; two hinged handles and three fleur de lys' at top to support kettle.

En Route stand for burner and kettle

1890

Fuel can, from "En Route" set made by Drew & Sons, Piccadilly.

En Route fuel can

1890

Base plate for kettle, from "En Route" set made by Drew & Sons, Piccadilly. Five holes pierced in base that match those in stand.

En Route base plate

1890

Kettle, from "En Route" set made by Drew & Sons, Piccadilly. Contains pierced cylinder/tea strainer.

En Route kettle

1890

Tin, from "En Route" set made by Drew & Sons, Piccadilly. Slightly rounded lid; hinged; enamelled brass liner inside.

En Route tin

1890

Tin, from "En Route" set made by Drew & Sons, Piccadilly. Hinged handle; securing clip; hinged lid.

En Route tin

1890

Square canister, from "En Route" set made by Drew & Sons, Piccadilly. Hinged lid.

En Route square canister

1890

Kettle, screw top lid, wicker handle, tea insert strainer, from Drew & Sons "En Route" Tea Basket, c1890. Overall: 155 mm x 165 mm x 115 mm; strainer: 102 mm x 50 mm.

Kettle for En Route lunch set

1890-1910

Tea caddy for Drew & Sons "En Route" Tea Basket, c1890. With enamelled insert inside. Insert: 54 mm x 122 mm x 93 mm; overall: 64 mm x 128 mm x 98 mm.

Metal tea caddy for En Route lunch basket

1890-1910

Pan, white metal, two folding handles, for Drew & Sons "En Route" Tea Basket, c1890. Overall (handles open): 75 mm x 200 mm x 128 mm.

Pan for En Route lunch basket

1890-1910

Oil burner for Drew & Sons "En Route" Tea Basket, white metal, c1890. Overall: 100 mm x 134 mm x 83 mm.

Oil burner for En Route lunch basket

1890-1910

Pan lid, white metal, part of Drew & Sons "En Route" Tea Basket, c1890. Overall: 22 mm x 129 mm.

Pan lid - part of En Route lunch basket

1890-1910

Leather handle for luncheon basket, Drew & Sons "En Route" Tea Basket, c1890.

Leather handle for wicker lunch basket

1890-1910

Luncheon basket, wicker basket containing tea making items and picnic plates, Drew & Sons "En Route" Tea Basket, c1890.

En Route wicker lunch basket

1890-1910

Pocket brass framed sextant, with mahogany keystone box, made by Jesse Ramsden, Piccadilly, London, England, 1785-1795. Polished brass frame and limb, no handle. Signed on the crossbar: ‘Ramsden London’. Brass scale from -2° to 145° every 30', measuring to 125° (digits read from the pivot). Brass vernier to 1', zero at the left. The tangent screw is on the front of the index arm; the clamping screw is on the back. Two shades (both red); no horizon shades. Index-glass adjustment by screw; adjustment of the horizon glass by fixed milled screw and by Dollond's extended lever and clamp, operated from beneath the telescope bracket. Detached telescope bracket, to be fit to the frame by a dovetail mount; perpendicular adjustment by rising-piece and a milled screw. Detached magnifier on a 35-mm swivelling arm. Telescope (62 mm) erect image. Shaded eyepiece (red).

Pocket brass framed sextant

1785-1795

Oral history interview with Mervyn Rogers, conducted and recorded by Frank Paterson at the RAF Club, Piccadilly, London on 12 March 2020. Duration: 1 hr. 15 min. 11 sec. Early career; area management; Lew Adams; train service management; joined Deloitte Haskins & Sells; transport and distribution projects; Coopers merger; EC Directive 91/440 implications; separation of track from trains; train paths; Terry Worrell; Ivor Warburton; Treasury pressure; vertical integration issues; advising on access agreements after EC Directive 91/440; infrastructure maintenance and renewals; shadow train operating companies (TOCs); reflections

Mervyn Rogers interviewed by Frank Paterson

2020-03-12

2 levels. Part of the three-foot geodetic theodolite, sometimes called the ‘great Theodolite’, used for the Principal Triangulation of Great Britain. Made by Jesse Ramsden, Piccadilly, London, 1791.

2 levels from the 3-foot geodetic theodolite

1791

2 horizontal circle covers. Part of the three-foot geodetic theodolite, sometimes called the ‘great Theodolite’, used for the Principal Triangulation of Great Britain. Made by Jesse Ramsden, Piccadilly, London, 1791.

2 horizontal circle covers from the 3-foot geodetic theodolite

1791

Components from the three-foot geodetic theodolite, sometimes called the ‘great Theodolite’, used for the Principal Triangulation of Great Britain. Made by Jesse Ramsden, Piccadilly, London, 1791. Components consist of: 3 lamp microscope housings; 2 oil lamps with condensing lens; small oil lamp (without case); oil lamp brackets plus 2 lamp covers; clamp and sector clamp; telescope dust cap with apertures; 2 curved double bracket pieces; 1 single bracket piece; flange disc; 7 eyepieces; 1 filter; 1 right-angled eyepiece; dust cap; brush; 4 microscope illuminating mirrors and an assortment of bolts and fittings.

Components from the 3-foot geodetic theodolite

1791