In March 1741 Doddridge sent him to Whitchurch and Chester to collect evidence for an alibi in the case of Bryan Connell, then under sentence of death for murder (executed 3 April).
Job Orton, who retired to Kidderminster in 1766, was scandalised when a drum-major of the Northamptonshire militia was allowed to preach in Fawcett's pulpit.
In July 1780 Fawcett was prostrated by illness; the disease was supposed to be the stone, but was in reality an ulcer.
On his death his congregation divided, the Independents retaining the meeting-house, and an Arian secession building a new place of worship.
His major pieces were: Fawcett's son Samuel was ordained at Beaminster, Dorset in 1777; he became a Unitarian, and retired from the ministry, living on his private estate near Bridport.