The letter raises several questions about places and adresses that either have changed name, or do not exist anymore
The street adress "Lange Russbrug Straat" does not exist today. Either the street name has changed, or there is a spelling mistake in this name. Also I did not find any Synagogue on Highway, London.
Note that the name Rappoport may have also been misspelled from Rappaport, Rapaport or Rapoport.
