A set of 297 drawings of the TAURUS-1 Fabry-Perot spectrograph and imager of the 2.5m Telescope (Isaac Newton Telescope or INT). The drawings were originally in three rolls labelled 'FE 2.5m Tel. Instruments Taurus I, Fabry Perot, Drgs BO, BP, BQ, BR, BT, BU, BX, BY and BZ (V and W size shts)'; '(X and Y size shts)'; and '(Z size shts)'. They include drawings of five sizes: V, W, X, Y and Z, V being the largest.

The Isaac Newton Telescope was moved from RGO Herstmonceux to the Roque de los Muchachos Observatory, La Palma in the early 1980s. The TAURUS-1 Fabry-Perot spectrograph and imager saw its first light in April 1985 and was decommissioned in February 1989. It was a wide-field, imaging interferometer designed to obtain spectral information of extended emission-line objects, producing monochromatic pictures of nebulae. Those images could then be interpreted to understand their motions and three-dimensional structure.