Letter from R [Richard] Townsend, Trinity College, Dublin, to [Charles] Taylor He has read Taylor's theory of orthoptics with interest and considers it quite valid. For confirmation, he has sent it off for a second opinion to Dr. [George] Salmon. The general conclusion admits of immediate verification, and Townsend gives five proofs of this. He will communicate again when he hears from Dr. Salmon. 1 February 1882