Comberton, that's a good find! However, the Marrriage Certificate I'm looking at says they were married "in the Register Office in the District of Islington", definitely no religion involved! What I'm trying to find out is: was there a dedicated office somewhere (and, if so, the address), or did professional people who took on the role of registrar use their own place of business as the Register Office, or, indeed, a room in their own home?