Dear Frances, I have checked my records and this is one of my interpretations based on marriage dates, christening dates and location from all sources e.g.MANXNOTEBOOK, IGI (old and new search) etc.
I am in the middle of the project and full verification of items has not been completed. This was one of them.
I always try to make sure that people understand that anything I have, currently, is open to change.
But the up side to your question showed me that I have two marriages between a Thomas Casement and a Catherine Garrett, 12/8/1717 Andreas and 20/8/1727 Lezayre.
Could these be the same, just badly transcribed? I got both out of the MANXNOTEBOOK. Do things from Andreas somtimes get recorded under Lezayre or vice versa? They are next door to each other.
Would investigating Catherine Garrett help prove anything?