William Warner Born Accomack County VA Died Rowan County NC USA

Some people have published in their family charts that William Warner (who was born in Accomack, VA, who died in Rowan County, NC) was the son of Colonel Daniel Warner and Sarah Hill Warner, of Portsmouth, NH, USA. I recently found a transcript of Sibley's Harvard Graduates that provides some evidence.
"William, son of Daniel", attended Harvard. He left early before commencement in 1754. It is noted that he returned to take his exams before Harvard published their catalog in 1761. It is also noted that William Warner died at sea. These notes specifically state that this William Warner who attended Harvard is the son of Daniel and Sarah Warner.

Post Note/Edit 1:
I requested photo copies of the original documents from Harvard, which I now have. Sibley's Harvard Graduates might be incorrect. The notes do not say he died, they say "did he die at sea?".

Post Note/Edit 2:
I found in a Wentworth Genealogy published in the late 1800's (the family of New Hampshire colonial Royal Governor) where it is stated that William Warner, son of Daniel Warner and Sarah Hill Warner, married and moved to Rhode Island. (available at online search through Google Books)

Post Note/Edit 3:
The following website offers additional proof that William Warner of Accomack County, VA and William Warner of Rowan County, NC are two different individuals. Source: http://www.easternshoreheritage.com/processions/accomack/acc_6/household_43.htm

Post Note/Edit 4:
William is listed as a graduate of Harvard class of 1754. Sources: Quinquaennial Catalogue of the Officers and Graduates of Harvard University 1636 - 1915 Cambridge, Massachusetts, Harvard University Press in the Two Hundred and Seventy-Ninth Year of the College 1915.