See Castle Street East 1 to 15 &c in London Addresses dataset
No 10 Castle St East Land Tax 1796-1798 Messrs Kingdon & Davis 1800-1805 Peter Kingdon
SunFire 1792 Peter Kingdon & Richard Davis perfumers 402 Oxford St (Charles Braxtone gent, owner?) / Peter Kingdom bach otp = 20.7.1798 St Marylebone by lic Ann Stanley wid otp wits Elenr & Heny Masburne Marr Lic 19.7.1798 PK perfumer (and), 21 yrs & upwards. (A Joseph Kingdon had married an Ann Stanley 2.8.1792 St Giles Cripplegate) / will PCC Peter Kingdon of Enfield Highway wife Ann nephews Wm Toutt (?), Wm…