Series consists of seven letters Walter Robert Adams wrote to Rowley.

Series consists of ten letters John Dart wrote to others.

Series consists of 24 letters William Willcox Perrin wrote to Rowley, his friend Mackenzie and others.

1 letter written by Augustine Scriven.

Series consists of three letters Acton Windeyer Sillitoe wrote to others, and one license.

Series consists of eleven letters John Charles Roper wrote to Rowley.

Series consists of three letters Harold Eustace Sexton wrote to Rowley.

Series consists of fifteen letters De Pencier wrote to others.

Series consists of nineteen letters Alexander John Doull wrote to Rowley and a Colonel Rowley [brother?].

Letters from Frederick Du Vernet to Rowley, as well as another man named Robinson.