Who is this person?

[AussieMick]

Hurrah! Well done Susan.
Yes "Peelers" = Constables. John Constable painted The Haywain and the Cornfield

Charles H Constable ...
https://en.wikipedia.org/wiki/Charles_H._Constable

"In 1847, Abraham Lincoln defended Robert Matson, a slave owner who was trying to retrieve his fugitive slaves. Matson had brought the slaves from his Kentucky plantation to work on land he owned in Illinois. The slaves were represented by Orlando Ficklin, Usher Linder, and Charles H. Constable. The slaves ran away while in Illinois and believed that they were free, knowing that the Northwest Ordinance forbade slavery in Illinois. In this case, Lincoln invoked the right of transit, which allowed slaveholders to take their slaves temporarily into free territory. Lincoln also stressed that Matson did not intend the slaves to remain permanently in Illinois.

Even with these arguments, the judge in Coles County ruled against Lincoln, and the slaves were set free. This was part of a principle "once free, always free," which was adopted in Illinois and other free states. One source described Constable at the time of the Matson slave case to be "the best-educated lawyer at the bar."