> Later on, when the Japanese had established their superiority at sea, and after the officer in command of the Russian fleet had voluntarily abandoned all idea of attempting to regain the offensive, the weakness of the geographical position of Port Arthur, at the end of a long peninsula which could be easily isolated, was at once brought into prominence (pp. 393-394)
Здесь логическое передергивание у британцев. П-А было легко изолировать не из-за географии, а из-за слабого перформанса армии. Ленинград, напр, был в ВОВ успешно изолирован немцами, хотя и не находится "на конце длинного полуострова".