These sketches are the result of years of inquiry, research and compilation intended to give such traditions and facts as could be had from reliable sources and records. The demand for sketches of many of Pitt's prominent men made necessary the addition of a second part. Advertisements were necessary from a financial standpoint and are included in the back, separate and apart.

Some vols. include supplemental journals of "such proceedings of the sessions, as, during the time they were depending, were ordered to be kept secret, and respecting which the injunction of secrecy was afterwards taken off by the order of the House."