ROSS, Alexander. Medicus medicatus: or the Physicians Religion cured, by a lenitive or gentle potion: with some animadversions upon Sir Kenelme Digbie's Observations on Religio Medici, London: James Young, 1645, small 8°, FIRST EDITION (without ?blank A1, title very lightly browned) [Krivatsy 9952; Waller 8232; Wing R1961] [bound with:] George Digby, Earl of BRISTOL. Letters between the Ld George Digby, and Sr Kenelm Digby kt concerning Religion, London: for Humphrey Moseley, 1651, 8°, FIRST EDITION, issue with "Sherborn March 30, 1639" at end of text (title and a few margins lightly browned) [Wing B4768] [and:] Kenelm DIGBY. Observations upon Religio Medici, London: by R. C. for Daniel Frere, 1643, 8°, FIRST EDITION (without ?blank A1, title lightly spotted, a few spots throughout) [Krivatsy 3254; Wing D1441], 3 works in one volume, slightly later calf with Lord Houghton's crest to front cover (head of spine chipped, front joints cracked), bookplate of Robert, Marquis of Crewe.