A Dr John Worthington appears regularly in the Preston court leet records from 1676 to 1695.  He is probably the Dr Wortton who is recorded at a house in Cheapside in the 1685 survey of Preston (see plan).  Similarly he is probably the doctor who appears in the diaries of Thomas Bellingham and Lawrence Rawstorne whose name is variously spelled Warton, Werton and Worton. And also the John Worthington gent in the 1682 guild roll. 
He was quite possibly the ‘young Doctor Worton’ named in a letter to Roger Kenyon dated 13 July 1681 as one of the ‘rioters’ preventing bailiffs from distraining goods from a Madam Pennington at her house in Wigan. 
 ‘Preston Court Leet Records’, accessed 29 January 2017, http://c5110394.myzen.co.uk/mw/index.php?title=Main_Page.
 ‘Friargate West. Cheapside West, Friargate East’ (plan, Preston, 1684), DDX194/7, Lancashire Archives.
 W. A. Abram, The Rolls of Burgesses at the Guilds Merchant of the Borough of Preston, Co. of Lancaster, 1397-1682 (Record Society of Lancashire and Cheshire, 1884), 179, https://archive.org/details/rollsburgessesa00langoog.
 Historical Manuscripts Commission (Fourteenth Report, Appendix, Part IV) The Manuscripts of Lord Kenyon (London: Eyre and Spottiswoode, 1894), 128, https://ia800203.us.archive.org/6/items/manlordkenyon00greauoft/manlordkenyon00greauoft.pdf.