I am descended from your Stan Driver's brother Harold.
I've been doing a little digging with the Lesperade family, and have come up with a marriage for William LESPERADE and Sarah Alice ELLINGTON in Wilcannia, NSW in 1892.
I have Sarah, using the name Alice (which she does also in one of the births of her children) dying in SA in 1902 (which is in childbirth). William Lesperade appears in the NSW Country Directories in 1930 and 1936 and 1937 in Darling, Milparinka and is also listed in the Outback NSW Pioneers of Corner Country.
I haven't found his death yet.
Would be happy to chat with you by email.