- Last Name: Clark
- Given Name: Mercy Maria (Aldrich)
- Birth: 1824
- Death: 1902
- AGED: YR: 78
- Maiden Name: Aldrich
- Spouse Of: William Stevens
- Middle Name: Maria
- Stone Condition:excellent
- Cemetery: East Blackstone Quaker Meeting House Cemetery
- Section: A, Row: 3, Lot: A3, Stone: 68
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