This is a very strange portrait. It depicts two individuals (off-center and not filling the frame): Abel Roper (who published a newspaper called the Post Boy starting in 1695) and his nephew and assistant Edward King. Roper’s publications tended to make people angry (apparently angry enough to pull off his wig and beat him).
The curious emblem at the bottom of the print depicts a pillory and what appears to be another form of punishment device (leave a note in the comments if you know its proper name) with pages nailed to the bars. And the motto (“Nec lex est justior ulla”) is an abbreviated and modified form of a passage by Ovid that translates as “There is no law more just than that the plotters of death should perish by their own designs.” Often connected in biblical commentaries with Haman’s execution on the gallows he had originally built for his enemies, the lines point to the irony of being destroyed by your own schemes. Used here, beneath the portrait of a man well-known for using print as a political weapon, is it an indication that this was a hostile depiction?