Hardkus 27.10.1798 at John King's
Careful examination of Godwin's manuscript diary suggests this may have been Hardkers. I've found no instances of the name Hardkus in any sources but the name Hardker can be found occasionally in the north of England and in USA, possibly a variant of Hardaker. But I've not found any person of that name who might have been referred to here, in the plural.