I meant to say that your cut-off point of 1924 onwards excludes most ships' passenger name indexes.

Victoria has unassisted immigration to 1923:
http://proarchives.imagineering.com.au/index_search.asp?searchid=23

Keep an eye on this website because they keep expanding the years available, and this port was often called into by ships on the way to Sydney and other Australian ports and to NZ, to and from the British Isles.

Sue