Hi Carol Wright, I just checked one of my Church Register books by Hallett. There are 12 listings for William Wright - only two for William Henry Wright as follows.I do not believe these are your man - possibly related though.
Page 526 - Pembroke Coloured Baptisms: Wright, William Henry - no father - mother, Mary - bap. 1844, May 18th (age 17 months old) - comment: Pembroke Parish - illegitimate.
Page 670 - Pembroke Burials: Wright, William Henry age 72 yrs. burial 1893, Aug. 3.
I will check further for you on the Dill line. Judy in Bermuda.