Unfortunately, I have very little to add.

Her Death Certificate from Newburgh, New York, states her name, date of death (April 1, 1873), age at death (78y, 7m,19d), married state(widowed), birthplace (Ireland), Father's and mother's names and birthplaces (parents UNKNOWN, born Ireland), Place of death (Western Ave, Newburgh NY), cause of death (phthisis pulmonalis).

Burial: 02 Apr 1873, St. George's Cemetery, Newburgh NY
Cause of Death: Phthisis Pulmonalis (Tuberculosis)
First Communicant: 20 May 1866, St. George's Church.

So Margaret Bowes/Bows Peel was born abt. September 13, 1795 in Ireland, parents names unknown. Married Henry Piles later Peel bef. 1826 in Ireland. One of their children, Catherine Piles, was baptised 29 April 1827 in Ashfield Parish, Cootehill, Co. Cavan. A son, John Peel, was also born in Co. Cavan c1827 according to his Australian Death Certificate.

Hope this helps a little!