Hi
I'm a volunteer at Calstock archive, and may be able to answer a couple of points above. Firstly, (to Carole W) Calstock, being a mining area, had a transient population - so people very often married far away from their original birthplace. Soph 87 I'm really confused as to why you think they married in Calstock, as there is no immediate evidence of a marriage here? As Kris has directed you to the Calstock. info listings - these are fairly comprehensive for the latter period (we have a few additional from the 1600s at the archive), and the marriage doesn't appear to be there. The Martyn family in Calstock go back a long way - and there are still Martyn's in the parish now.... BUT be really careful with this surname, because the spelling of Martin and Martyn is completely interchangeable at the time you're looking for. If you let me know why you are so certain the marriage took place in Calstock I might be able to search some more.