This Mary Greenwood might be a possibility. Her age is 18 in 1870 which indicates a birth year of 1852.
1870 Census Ward 26, District 84, Philadelphia, Philadelphia County, Pennsylvania
Greenwood, Mary; age 18; born England; Domestic Servant
Household of Thomas Gillespie, Brick Manufacturer
Note that Augustus Reese is found in Ward 25, District 83 on 1870 Census.
This might also be a possible match for your Mary Jane Greenwood:
New York Passenger Lists for the Ellen Austin, March 20, 1860
John Greenwood, age 43, Shoemaker, England
Amanda Greenwood, age 21, Spinster
Mary Jane Greenwood, age 7, Spinster