Thank you
Was she born about 1780 and died 1884, age 104, a considerable age for that time. Did she marry, if so was Jenkins a maiden name or married name?
I can only see the death of one person with the first name Keziah registered on the Isle of Wight in 1884 and that was a Keziah Croad age 84. I cannot though find her on any census.
I can only see one person with a first name Keziah on any census in the IoW who was born in Dorset, she was a Keziah Andrews who in 1851 was living with a husband James Andrews at Ventnor age given as 50. In 1861 her name is spelt Kesiah. She seems to have possibly died in the Sherborne, Dorset district in 1888, age given as 84.
Perhaps you could also give some more information on the family of Kesiah Jenkins, to assist in the identification of the correct person.