“I hope they will not want Alexander at Bath this good while, as I shall have much occasion for his help in fitting up three seven-feet telescopes”, HerschelCaroline, 25 August 1801, RAS MSS Herschel W.1/8.18.
2.
“Vous avez demandes Mons par la voye de Mr. Zach si je pourrois fournir des telescopes Newtoniens pour les amateurs & quels en seroient les prix. Mon frère en fait à present de toute grandeur”, HerschelBode, 20 July 1785, RAS MSS Herschel W.1/1, 134–5.
3.
WatsonHerschel, 5 June 1786, RAS MSS Herschel W.1/13.W.45.
4.
BarnabaOriani, Un viaggio in Europa nel 1786: Diario di Barnaba Oriani astronomo Milanese (Florence, 1994), 138: “Suo fratello lavora i telescopi de vendere quando non v'e musica a Bath.”.