This is an interesting publication from 1742 - ‘A Master Key to the Rich Ladies Treasury’. This is a list of the country׳s wealthy widows and spinsters with their addresses and an assessment of their financial worth for the benefit of fortune hunters! Evidently Jewish heiresses were fair game as well as there are some Da Costa, de Castro and Lindo ladies mentioned. Interesting to work out just which ladies are meant ...https://books.google.co.uk/books/download/A_master_key_to_the_rich_ladies_treasury.pdf?id=pEsOAAAAQAAJ&hl=en&capid=AFLRE73WL-uiyWhNnJp4X74ToXSaL_lqUVxqmqi9q-vyEkWk-meo0Xl0G2zgmGQXDuZ0SwjeVzrD_yGiUklF-urBrbr6qsDt2A&continue=https://books.google.co.uk/books/download/A_master_key_to_the_rich_ladies_treasury.pdf%3Fid%3DpEsOAAAAQAAJ%26output%3Dpdf%26hl%3Den#