I have now been through all my Garrow papers and I am afraid I cannot find from where where I got Sarah’s name!
However, at the plaque unveiling yesterday I was put on to the following.
From the 1890s Leland L. Duncan, antiquarian and author, recorded memorial inscriptions in over 80 Kent churchyards. For the churchyard of St Margaret in Darent, Kent he wrote, among other items,
“An altar tomb covered with ivy. North side. Sarah, wife of William Garrow of Pegwell in this county died June 30 1808 aged 56. (The rest smothered in ivy)”.
This is recorded by Frank Bamping 31 October 2000 for the Kent Achaeological Society.