On the occasion of the controversy which arose in consequence of the proceedings at the Salters' Hall conference of London ministers in February 1719, he wrote two tracts on the side of the dogmatists.
This plan is described in the 'Alphabetical Catalogue of Books and Pamphlets belonging to the Circulating Library in Crane Court' (Fleet Street), 2 vols.
At some period later than 1755 Fancourt left Crane Court, and, after several changes, moved his library to 'the corner of one of the streets in the Strand,’ where his various schemes finally broke down.
The library was taken by his creditors, and he retired to Hoxton Square, where he was supported by some of the dissenting ministers, till he died at the age of ninety, on 8 June 1768.
In the Crane Court library catalogue he offered for twelve guineas to teach 'any one of a common capacity and diligence' to read, write, and speak Latin with fluency in a year, by giving them five or six hours' tuition a week.