lightering https://books.google.com/books?id=7breCgAAQBAJ&pg=PA26&lpg=PA26&dq=%22Mobile+Point%22+lightering&source=bl&ots=JC_J-Zbf9Z&sig=2KlkIYtR612AkDuKIpBLWNyR7vM&hl=en&sa=X&ved=0ahUKEwjPpNukq_7SAhVHMSYKHembB1IQ6AEIHDAA#v=onepage&q=%22Mobile%20Point%22%20lightering&f=false

Hamilton's MOBILE OF THE 5 FLAGS https://play.google.com/books/reader?id=hCaenv42xHoC&printsec=frontcover&output=reader&hl=en&pg=GBS.PP2