Casement, R., & Paterson, A. W. (1909). Copy letter from ["Messrs Edmundsons Ltd"] to A. W. Paterson regarding the difference between their luminous buoys and those of the American Buoys, and also discussing Paterson's possible trip to South American to advertise thier buoys and circulate their pamphlets.

Casement, Roger, and A. W. Paterson. Copy Letter from ["Messrs Edmundsons Ltd"] to A. W. Paterson Regarding the Difference Between Their Luminous Buoys and Those of the American Buoys, and Also Discussing Paterson's Possible Trip to South American to Advertise Thier Buoys and Circulate Their Pamphlets. 1909.