The links below will take you to the "Australia Imperial Force of Persons Enlisted for Service Abroad": Attestation papers of Henry Lee-Thomas (Thomas Henry Lee). There are four pages to this document. Notice his signature on page 2 and a physical description of him on page 3. Also, note on the first page that his name started to be written with the first name of "Thomas" and that was crossed out and the name of "Henry Lee-Thomas" written instead.
There is also a link to his funeral program which includes a picture. He was a very handsome man.