A. H. Jarret, "Boyden Observatory [A Concise History]", published in the University of the Free State’s journal <i>Acta Academica</i>, no. 12 (1979), is available online at this <a href="http://www.ufs.ac.za/faculties/content.php?id=4364&FCode=04&DCode=113&DivCode=D015" target="_blank">website</a>.