| Description | Congratulates Mackenzie Davidson on the achievements of his son [unspecified]. Thanks Mackenzie Davidson for his prompt response to his request [the lecture at Worcester]. Writes of the decline of the observing powers of young people, the necessity of keen eyesight amongst sailors and the superiority of eyesight among country boys compared to town boys. Offers to add a few supplementary remarks to Mackenzie Davidson's lecture if that would be helpful. |