how do you find out more about obscure old actors on the internet

there's an actor who starred in the old 1950s series 'long john silver' starring the late robert newton, he plays 'old stingley' in the series and his real name is john brunskill, but when i try to look up more information about him on duckduckgo, it doesn't list any bio on him, just lists his credits in the 1950s series but not much else..