Consists mainly of letters to Robert Spence Watson. Topics include, but are not limited to, British politics and the Liberal party, contemporary Europe, Armstrong College (later Newcastle University), the Peace Society, lectures at the Literary and Philosophical Society of Newcastle upon Tyne, and contemporary literary and scientific achievements. Other regular recipients of letters include Elizabeth Spence Watson, Frederick Weiss, and Charles Prestwich Scott.

The Spence Watson's wide-ranging public activism, make their correspondence a valuable source of opinions on the social and political matters of the day from a wide range of prominent persons.