Correspondence, Letter from the Ballarat School of Mines to Siah Yok Lin, 1966, 14/02/1966 Physical description Carbon copy of letter from E.J. (Jack) Barker, Principal of the Ballarat School of Mines to former student Siah Yok Lin. Subjects ballarat school of mines, e.j. barker, colombo plan, international students, siah yok lin