Karenlee,
I recently came across a rellie who died (1913) in the Constance Road Workhouse.
I thought it was quite sad for him to die in the Workhouse, when I knew he had family. I did some research and found that a workhouse death did not mean he was a pauper (as Valda has stated). It was also recorded that he was "buried by friends".
Just wondering if you found Mary & John Edwards, in the Admission & Discharge Register...... if you haven't here is the link. It does give you a little more information about them.
http://search.ancestry.co.uk/search/db.aspx?dbid=1557&path=R/h side - Browse Collection - Borough- Tower Hamlets
Poor Law Union - Stepney
Record Type - Admission & Discharge - Section - Bromley House: Admission & Discharge Register - 1867-1883
Mary is image 122 - John - 123.
Not the burial place - I'm afraid.

Sarra