Browne, P. H., & Casement, R. (1912). Letter from Percy H. Browne to Roger Casement regarding donations towards the fund, the persuasion needed to convince people that a Roman Catholic mission is the only way to help the Putumayo natives within a reasonale time, the delay in the publishing of Casement's report and the attempt to obtain an additional signatory for the appeal.

Browne, Percy H., and Roger Casement. Letter from Percy H. Browne to Roger Casement Regarding Donations Towards the Fund, the Persuasion Needed to Convince People That a Roman Catholic Mission Is the Only Way to Help the Putumayo Natives Within a Reasonale Time, the Delay in the Publishing of Casement's Report and the Attempt to Obtain an Additional Signatory for the Appeal. 1912.