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Believes he has discovered a second satellite of Neptune; gives readings.
Sends on announcement of 'new planet Parthenope' from Annibal de Gasparis at Naples.
Is just leaving for France, and has time only for a few thoughts in response to GA's 1850-8-18.
Will be very busy learning his new job for a while, so GA should start working with other committee members; JH makes some suggestions about eclipse observation [see GA's 1850-12-14].
A note accompanying a letter that seems to come from François Arago, and that seems to JH to show a disturbed state of mind; asks GA for his opinion.
Asks GA for help in identifying an astronomer for the observatory at Trivandrum, India.
Thanks GA for his 1850-4-1, and provides details of a likely candidate.