When I was Director of the Double Star Section of the Astronomical Society of Southern Africa (ASSA) I was granted permission to use the old McClean refractor telescope at the headquarters of the South African Astronomical Observatory (SAAO) in Observatory, Cape Town. At the time I was interested in using speckle interferometry techniques to measure separations and position angles of double stars. In 2001 I published an article about my work in MNASSA (Monthly Notes of the Astronomical Society of Southern Africa).
That particular issue of MNASSA somehow was lost, but I was very happy to discover a PDF version of my article, which had somehow survived several computer changes over the past 15 years. Anyone interested in double stars may download the article from the downloads page.