Thank you for your reply Maddie. Yes you are right the R/C church was established later. However, I expected Catherine, if she was my Mary Katherine, to be buried in the same Chorleywood cemetery as her father and her younger sister. They were buried in 1888 in different months of the year and in separate places, both in unconsecrated ground. Probably both buried by that R/C priest Fr Hardy. Although they did actually die in their own parish also, unlike this young lass who died in Watford. HALS was only looking at Rickmanworth as far as I know although I may have to check with them re Watford also. I had a reply from Harrow saying that their church was not established until later re any baptisms. I think I may have already e-mailed them before also. I received a reply from Ware church also saying, no available records kept. I think with the churches and Westminister archives I keep coming up against a brick wall. I am getting confused as to who I have already e-mailed at this stage, although I am sure that I have e-mailed the most likely ones so far.