Hi
My name is Susanne Cook, Japeth and Mary Cuke are my GGG Grandparents.
I don't know if you have found any further information regarding Mary, I may be able to help. I have found her on the 1841 census living with her eldest son Benjamin they are listed as Cook she is 55 born 1786 and the address is Ebbw Vale Iron Works, Bedwellty Manmoel.
Not sure how the name changed to Cook, but I have also found the gravestone for Benjamin, in Cwmavon he died aged 47.
Getting back to Mary, I have located her on the 1851 Census. Year of birth 1783, age 68 listed as a woollen worker. She is living with John Davies aged 19 and his wife Elizabeth aged 19. Mary is listed as Mother in Law, but I believe this should be Grandmother in Law, as I think Elizabeth is Mary Grandaughter, Elizabeth being the daughter of Sarah Close, who is Marys eldest child. 1851 Census address in 17 White Hall Llanwenog Carmarthen. Mary was born Llandyssul, Cardiganshire.
I hope this helps if you haver any further information, please can you pass it on to me. If I can help further please let me know.
Last of all do you know that Japeth was born in Barbados.
Look forward to hearing from you.
Regards
Susanne