a1393 J. Gower (Fairf.) vi. 1301 (MED) Of the fyr the Piromance With questions..He tempteth ofte, and ek also Aeremance in juggement.
a1475 (?a1430) J. Lydgate tr. G. Deguileville (Vitell.) 20708 (MED) My secounde scoler in the hayr..At alle tymes doth devyne; And therfor..Hyr name ys callyd ‘Aermancye.’
1496 (c1410) (de Worde) i. xxxvi. 77/1 Aeromancye, that is wytchecrafte done in the ayer.
1546 T. Langley tr. P. Vergil i. xviii. 33 a Heromancie that is a kinde of propheciyng by the Ayre.
a1592 R. Greene (1594) sig. Bv By Aeromancie, to discouer doubts.
1608 E. Topsell 75 Country people..haue learned of them Æromantie, that is, diuination of thinges by the ayre, for they haue a fore-feeling and vnderstanding of raine and windes afore-hand.
1623 H. Cockeram Eromancie, divination by things in the ayre.
1630 J. Taylor iii. 12/2 By fire he hath the Skill of Pyromanty By Ayre he hath the Art of Heromanty.
1753 Suppl. (at cited word) Barometers, thermometers, hygrometers, and anemometers, are of considerable use in this kind of aeromancy.
1787 A. Hawkins tr. V. Mignot II. 214 According to the principles of aeromancy, it was difficult to give a favorable interpretation to this event [sc. a hailstorm].
1855 E. Smedley et al. 333 Aeromancy.., includes every kind of divination by the phenomena of the air.
1895 F. T. Elworthy 444 Aeromancy, divination by appearances in the air.
1914 23 297 Those [books] which deal with different varieties of divination, namely aeromancy, pyromancy, hydromancy, geomancy, and chiromancy.
1986 M. Stott 110 More obscure forms [of divination] are practised, too. These include Aeromancy divination by cloud shapes [etc.].
2002 T. Pratchett et al. xvi. 168 The Concise Lexicon of the Occult lists 93 methods of divination, from aeromancy (divination by the shapes of clouds) to xylomancy (divination by the shapes of twigs).