There are some apprentice records on Find My Past.
A quick look for the name John Davidge, they all seem to be down south - Dorset and Hampshire mainly. What was John Davidge's trade?
You have probably seen (Lancs OPC again):
Burial: 7 Feb 1789 St Saviour, Ringley
Diana Davidge
Abode: Prestolee re: Outwood
Burial: 16 May 1792 St Saviour, Ringley
John Davidge
Abode: Outwood
And on Find My Past, this marriage (Bishops Transcript record):
25 March 1788, Ecclesfield, Yorkshire
John Davidg of Bolton in the County of Lancashire to Diana Hattersley of this parish

Barbara