Biographical details about Thomas O'Brien.
Includes four photographs of Thomas O'Brien.
Accompanied by Miner's right certificate, 1971 for Matthew O'Brien, Queensland Railways Centenary Ceremony Granchester advertisement 1965, letters re correspondence with Mrs Lyon, widow of the navigator of the Southern Cross, and material including greeting cards relating to Matthew O'Brien's radio operator's work as VK4MM.

Includes photographs, negatives, letter and typescript relating to radio station VK4MM, certificates.