Hi Jennifer,
Not sure if you have obtained any further information or not, but will tell you what i know. I live on Guernsey and am related to Callisters on my mothers side. My GG Grandfather was Henry Callister, brother of William Frederick. I have WF being born on 21/02/1842 in Guernsey, he had 2 brothers and 2 sisters. His father was William, b. about 1806 in IOM and his mother was Mary Blondel, b. about 1818 in Guernsey. They married on 09/05/1841. Mary died 21/09/1856, but i have very little info on William from IOM. If you have any, please let me know. If you require any further info on any of the Callisters originally from Guernsey, please let me know. Also, WF & AJC had 9 children - John b. about 1871, died young. Regards
Wayne