Discusses various telescopes of his father and his father's [erroneous] announcement of his discovery of four additional satellites of Uranus.

Suggests reasons for doubting the distribution of bright stars that RP had reported. Responds to RP's query concerning a statement in Outlines Ast. Encourages RP's hypothesizing on star distribution.

Thanks RP for sending RP's Other Worlds than Ours and supplies comments, some favorable, on numerous claims made therein, e.g., on RP's theory that Jupiter and Saturn are hot and to some degree luminous.

Assures RP that he is not upset at RP for publicly questioning some of JH's ideas. Continues discussion of point in perturbation theory for Uranus.

Continues to explain matters in perturbation theory. Stresses need for careful observations in solar eclipses. Doubts the existence of the hypothetical intermercurial planet Vulcan.

Approves RP's method of preparing isographic projection charts of the distribution of bright stars, noting that JH's gauges of the southern stars are incomplete.