A very good assumption is that since he was very old and his immediate family was deceased, she moved in to take care of him some time in 1850. Apparently she died shortly after her uncle John Spencer. Her will was written with the flair of the time. The remainder of Matilda Spencers estate was split one third each between the sisters Sally Elizabeth Spencer, Rosetta Harriett Spencer and Henrietta Frances Spencer. Rosetta's name is sometimes found also as Rosey and Rosa.
Some extracts follow.
To my brother Benjamin Spencer, one hundred dollars, to my brother James Spencer two hundred and fifty dollars. To my sister Sallie Spencer, I give and bequeath the residue of my estate. Some extracts follow. The residue of my estate both personal and real I give and bequeath one half to my brother Benjamin Spencer the other half to be equally divided among the children o my deceased brother James Spencer, viz, Charles Spencer, Walter Spencer, George P. Spencer, Dolly Spencer and Winnie L. Spencer. F. H. Dryden, T. F. Bonneville, James P. Blaine.