"You post a quote from Mrs. Grant's memoirs stating she freed her slaves early in 1863."
No that's not what the quote says.
And I don't have time to chase this particular rabbit anymore. Perhaps you could do the legwork and get back to me?
"Eliza, Dan, Julia, and John belonged to me up to the time of President Lincoln's Emancipation Proclamation. When I visited the General during the war, I nearly always had Julia with me a nurse. She came near being captured at Holly Springs"
That's what you posted. The Emancipation Proclamation became effective January 1, 1863. Grant wintered in Holly Springs in 1862. According to Missouri records the Dent family slaves, including those mentioned by Mrs. Grant, were freed shortly there after.
You sarcastically suggest I do my leg work when your post is filled with contradictions. The fact of the matter is that neither Grant or his wife or his wife's family owned any slaves after January or February of 1863. In any event it would have been impossible for any of them to own any after January 1865. Dr. Williams' claim is wrong and you are mistaken if you believe it.