I rather doubt what I have will be much help, but I'll pass it along so you can add it to your Dunlap collection if you don't have it already. My interest is in the Richardson, McCreight, and Robinson families and so when I came across this I took some notes. I know these families were closely intertwined, I just haven't quite figured out how. Maybe this will mean something to you.
1828 Fairfield Estate File, Apt 61, File 940 James N Phillips estate Adm: Elizabeth Phillips Appraisers: Robert McCreight Sen, Abraham Richardson, JohnMcCreight Jr, John McCreight Sr, Robert McCreight Jun Adm Bond: Elizabeth Phillips, Robert McCreight, Abraham Ritchardson (sic)
The final return was dated in 1841. Elizabeth Dunlap, formerly Elizabeth Phillips and widow of deceased Harriet wife of James Simpson Mary Ann wife of ? (couldn't read)
Sale Bill, Mar 1828 Robert Robinson, Elizabeth Phillips (both Jr and Sr), Henry Crossland, Henry Jones, Abraham Richardson, John L Simpson, Margaret Taylor, Mansel(?) Dunlap, Artalysea Richardson.