Conversation so far:
Where was Hugh Trumble born?
Hugh Trumble was born in the inner Melbourne neighbourhood of Collingwood, Victoria.
When was Hugh Trumble born?
Hugh Trumble was born 19 May 1867.
Who were Hugh Trumble's parents?
Hugh Trumble was the son of William, born in Northern Ireland and superintendent of an insane asylum, and Scottish-born Elizabeth.

Question: Who was his mother
Self-contained rewrite: Who was Hugh Trumble's mother?