Did Thomas and Sophia really die on the same day?

Siblings said to be:  Benjamin CORBIN and William CORBIN

WARNING:  I have found no proof these are Sophia's parents.
Father said to be:  Nicholas Z. CORBIN
Mother said to be:  Eleanor __?__

1a.  Henry C. Peden, Jr.  1987.  St. John's and St. George's Parish Registers, Baltimore & Harford County, Maryland, 1696-1851.  Family Line Publ., Westminster, MD (Broderbund CD-178).

p. i	Transcribed from microfilm in the Maryland Historical Society Library in Baltimore, Maryland.
p. 222	[St. John's Parish] Page 240... February 10, 1745... Thomas Marsh and Sophia Corbin, married.

1b.  St. James Parish Register, Maryland, 1787-1815 (online at Ancestry.com):

MARSH, Thomas, abt. 80 yrs. old, buried from St. James, 8/7/1801

MARSH Mrs., wife of Thomas, buried from St. James, 8/7/1801

Are these RE-burials?

2.  Mrs. H. K. McAdams.  1929.  Kentucky Pioneer and Court Records.  Lexington, KY (online at HeritageQuest at Genealogy.com):

p. 81

MARSH, JOSHUA — Baltimore Co., Maryland — The 2nd. additional account of Joshua Marsh, administrator of Thomas Marsh, deceased.  Mentions Sons, John, Joshua, Thomas, David, Benedict, Beale and Clement.  Beneficiaries: James Bosley, James Enlows, Benjamin Hendon, James Stover, acting for their wives.  Also statement "current money paid by these accountants to Thomas Winks, Joshua Winks, and John Buck, who intermarried with Sophia Winks."  "Current Money retained by this accountant Joshua, as guardian of Achsah Temperance, and John Winks."  Recorded Oct. 5, 1803. Signed, Wm Buchannan, Register of Wills.

Who is "Achsah Temperance"?  Or are they two different women, Achsah and Temperance?  If Joshua is their guardian, they must be unmarried minors, so they are not his sisters of the same names. 

3.  Letter, dated 19 Jun 1858, from Keziah (GREENLAND) SHANAFELT (click her link for a full transcription) of Clarion Co., PA, to her son, Thomas.  Keziah is a granddaughter of Benjamin & Sarah (SIAS) CORBIN.  The letter is in the possession of  Laurel Shanafelt Powell of Colorado, and Lorinda Clendenon Greenland generously posted a transcription at her web site. 

My mother's father was Benjamin Corbin... He had a sister, lived in Ohio.  Her family was said to be very wealthy.  I think her name was Marsh...

Sophia is believed to be Benjamin's sister, but there is no indication that she left Maryland, and her children moved to Kentucky, not Ohio.  The MARSHes were, indeed, wealthy.

4.  WorldConnect (online at RootsWeb.com).

5.  Messages in the Marsh Family Genealogy Forum (online at GenForum.com).