curator of the Oxford Museum of the History of Science, made inquiries into their whereabouts. Gunther listed them in his Early Science in Oxford, Vol. 2: Astronomy as "not extant". But in 1936 during the refurbishment of the University Radcliffe Observatory, he was alerted by the Savilian professor of Astronomy, H. H. Plaskett, to a chance discovery of "certain old metal bars and plates behind some cases." These turned out to be part of the missing Savilian collection, including a mural quadrant, and an astrolabe of Queen Elizabeth I which Greaves took on his 1637-40 expedition to the Middle East. Gunther wrote two articles in The Observatory on his findings, one shorter preliminary report with a fuller appreciation a few months later. The inscriptions on four of the instruments (including Elizabeth I's astrolabe) read: 1659 Acad. Oxon. in usum praecipue Prof. Savilianorum: Ex dono Nic Greaves S.T.D. In memoriam Tho. Bainbridge M.D. Jo Greaves A.M. N. fra: olim Astronomiae Prof. Savil. Greaves' other, smaller astrolabe didn't surface until 1971, when it was discovered by Gunther's son A. E. Gunther at his mother's house. The cataloguer of the OMHS attributes this to an oversight on Gunther's part. The inscription around the edge of the limb reads: '1659 . Acad. Oxon. Ex dono Nic Greaves. S.T.D.' It doesn't appear in Gunther's 1932 magnum opus, Astrolabes of the World. Works Besides his papers in the Philosophical Transactions of the Royal Society, the principal works of Greaves are: Pyramidographia, or a Description of the Pyramids in Ægypt (1646) A Discourse on the Roman Foot and Denarius (1647) These were reprinted (together with a biographical notice of the author) as part of Greaves, John (1737) Miscellaneous works of Mr. John Greaves Vol. I and Vol. II. London: Published by Dr Thomas Birch, printed by J. Hughes for J. Brindley and C. Corbett. This also contains a reprint of Withers, Robert (ed. John Greaves) A Description of the Grand Signour’s Seraglio; or Turkish Emperours Court (1653) London: Printed for Jo. Ridley, at the Castle in Fleet-street by Ram-Alley. Pyramidographia was translated into French and published in Relations de divers voyages curieux, qui n'ont point esté publiees... (1664) Paris: Jacques Langlois, imprimeur ordinaire du Roy, pp. i-xxv [pdf 20-52], including Greaves' detailed drawings of the pyramids and mummies. Elementa linguae Persicae, authore Johanne Gravio: item anonymus Persa de siglis Arabum & Persarum astronomicis (1649) (Elements of the