Mary Griffiths
On the 1864 manifest of the ship General McClellan she is listed as Mary Griffiths because she was the daughter of Herbert Griffiths and Anne Rees. Herbert died in Wales and Anne married Thomas Williams between the time she and her daughters embarked from England and their joining the William S. Warren Company; mother and girls all appear on the roster of this company under the surname Williams.
Her surname is "Robinson" on Find A Grave website.
Media
Mary Griffiths (1856 - 1931) Profile