Thank you Geoff. Sorry, I didn't notice the link you gave me regarding the marrige

I did try looking on FreeReg, but didn't seem to find anything, perhaps I'm putting in too much info into the search page.
I had the death in 1824 of Clement and I agree that the 1820 death of Mary is probably the child originally called Mary Dunham. I did see the other Clement on the pilot site, but for some reason decided he wasn't one of the babies. I don't know who he was, but there were other Tubbs around Holbeach.
I was interested that there was also an Arabella Tubbs, father Thomas Tubbs who was buried 15 December 1811. If she was a daughter of "my" Thomas Tubbs, then he was a busy man, as my 2 x g.grandfather was born in 1811 too, but kept his mother's surname. I've got a CD somewhere of Lincolnshire bastardy bonds, so I'll get it out and see if I can find any more Tubbs. I seem to remember it is not very legible, so will probably wait until I've had my 2nd cataract done, as having had one done, my eyes are seeing different things at the moment.

I'm going to call it a day. I'm fed up with not being able to do searches properly tonight, it seems there are more people on the internet tonight than usual, so much for everyone supposedly being interested in some ball game
I can't even get onto Familysearch now to check out Arabella and the two Harleys to see if there is more info on there. As the first Harley's father is shown as Clement, it could be that the second one was also a child of Clement. Got onto Familysearch, and both the Harley's are children of Clement and Elizabeth. Maybe the Clement aged 63 was this Clement's father.
I presume of this parish, in relation to Ann Dunham just means she was living there at the time, as according to Ancestry she was born in Hull (they've transcribed it as Huell and I still can't get onto FindMyPast to check what they have).
Lizzie