BB: Elizabeth Henry Brewster did remarry after John Brewster died as per the personal history tree on Ancestry. See below. Mary Jane was married to a John Orr, also.
Source: Philadelphia Inquirer. January 11, 1891
On the 8th Inst., Elizabeth Parker, wife of the late Thomas Parker, and daughter of Alexander and Mary Henry born in the Parish of Aughadoay, County Derry Ireland, age 78. The relatives and friends of the family are respectfully invited to attend the funeral from her daughter's residence, Mrs. Mary J. Orr at 1348 Point Breeze Avenue Sunday at One o'clock. To proceed to Fernwood