I have also managed to trace my TOPHAM family to Pentrich, Derbyshire, around that time. I just don't know enough to be able to link Martha to us.
I have Rev James Jerom Topham (b) 1805. His father was John Topham (b) 1766, his father William Topham christened 1744, his father Matthew Topham (b) 1674, married on 13th May 1730 , Pentrich Derbyshire. Buried there too.