JH's opinions about disruptive effect of tremors on observatory if proposed railway tunnel is built under Greenwich Park. Proposes method for adjusting train schedule to reduce interference with observations.

Replies that he knows no one who would be willing to purchase the model of the moon.

Has just received his remarkable paper on the dynamical theory of crystalline reflection and refraction. Comments on this. The subject has not lately occupied his attention. Would like clarification on some points.

Presents a detailed discussion of the state of double star astronomy, including number known and number that are probably gravitationally linked. Gives an extended critique of WW's Lectures on Systematic Morality, arguing that WW's system is ultimately a happiness-of-mankind system and consequently rests on expediency considerations.