This archive contains most of the raw telescope data taken with the Isaac Newton Group (ING) of optical telescopes on La Palma (the 1-m Kapteyn (JKT), 2.5-m Newton (INT), and 4.2-m Herschel (WHT) telescopes). The data are physically stored on tapes at RGO (Royal Greenwich Observatory, Cambridge, UK). The observation log has 260,000 entries as of April 1994 and is searchable on-line through the ARCQUERY software at Cambridge (UK): SET HOST RLESIS (19527), login as ESIS, select menu option 1, answer CAVAD, and login as ARCQUERY. Alternatively, telnet to gxvg.ast.cam.ac.uk (131.111.69.20) and login as arcquery. For further information contact E. Zuiderwijk at ejz@mail.ast.cam.ac.uk. [References: Raimond and Van Diepen (1989), Raimond (1991, 1994), Zuiderwijk et al. (1994).]