A number of universities make doctoral theses, often extremely useful sources of otherwise unpublished information, freely available with the consent of the author. One of these is Durham, which has a thriving music department under Dr Jeremy Dibble. The following are valuable analytical studies of -
Alexander Mackenzie (1847-1935) by Duncan Barker -
http://etheses.dur.ac.uk/1441/Frederic Cowen (1852-1935) by Christopher J Parker -
http://etheses.dur.ac.uk/1834/Hamish MacCunn (1868-1916) by Alasdair Jamieson -
http://etheses.dur.ac.uk/2456/Samuel Coleridge-Taylor (1875-1912) by Catherine Carr -
http://etheses.dur.ac.uk/2964/ :)