Alice Maud was not a half sister. She was born in England 1875 and died in Johannesburg 1890 (age 15 of a hear disease)
Her mother was Ann Moon (also known as Mary Ann) born 1847 in Cornwall England.
Alice brothers and sister:
Mary Ann,
Jessie Caroline (died at 15 weeks)
William Robert (died in Boer War)
Rachel,
Jessie,
James,
Albert Ernest.
Their mother Ann retuned to England March 1898 and never returned home. She lived in England as the wife of Cutian Taylor. She died on 12 May 1905 in England.