Wants to compare Mr. Titterton's photographs of the spot groups to [Warren] de La Rue's. Has tried to determine if some localities regularly have spots.

Desires permission to present JH's 'diagram of "macularity"' to the R.A.S.

The research shows no particularly 'maculiferous' area on the sun, but WS may, as WS requested, present 'data' to the R.A.S. Has noticed two new spots on helioautographs on 20 and 27 April.

Thanks JH for mention of him in Outlines Astr. Sends detailed observations of Alpha Centauri system.

Thanks for the photographs WD sent for the dates requested in JH's 1870-4-23.

Sends report of Edward Sabine's 'conversaziones' of 12 Mar. and 23 Apr. Mrs. Birtwhistle wrote from Peking on 2 Feb.

Describes difficulties in producing glass pen and attaching it to pendulum to produce precise curves for aligning equatorial [telescope mount]. Sent artistic sample to JH's wife.

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.

Thanks JH for commentary on RP's Other Worlds than Ours. Responds to JH's comments, accepting most objections. Acknowledges his major debt to JH's writings.

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.

Admits JH is correct in suggested correction of RP's statement regarding perturbations of Uranus. Suggests that JH urge astronomers to observe the solar corona carefully.

Expresses skepticism on the claims made by F. Abbott, observing from Tasmania, of the detection of changes in the Eta Argus nebula. Compares Abbott's drawings with drawings made by JH and and by JH's son John.

About an application to the B.A.A.S. for a grant to fund the calculations related to reducing the magnetic observations of 1847-48.