If you are searching Ancestry's Essex Parish Register Index (EPRI) for a name with a double s in it and can't find it, try substituting a ff in place of the ss. An example is some I found today, I was searching for Classon/Classun children at Good Easter in the EPRI, unsuccessfully, I had already found them and viewed the PR entry images on Family Search, so just carrying out a cross check. Then I thought I wonder if someone has taken the ff at face value, I put in Claffun and up they came. I will get in touch with Ancestry tomorrow and advise them. Classon and Classun are variations of Claxton I've found in some Essex PRs, ie one of my ancestors baptised in Good Easter as Classon, married in Widford as Classon, his children baptised in Roxwell as Claxon and Claxton.