The information contained in the above document was found on FamilySearch.com and links a Mallory Holland, aged 24, b. 1835 from Isle of Wight Co., Virginia to marrying Martha Heath in the right time frame. John Holland and Nancy Holland are also listed as Mallory's Parents.
This is the closest we have been able to link the name Mallory and Sebril as one.
So, could Sebril Holland really be Mallory C Holland? Martha and Mallory married June 18, 1859 in Isle of Wight County, Virginia. They are both listed as Widows. Who was Mallory married to previously?