text: Longs first published paper was co-written with Chapman in 1949 for the Transactions of the Faraday Society on "Relative intensities in the Raman spectra of some Group IV tetrahalides".  In total, he published in the region of 200 scientific papers on Raman spectroscopy, including articles on its history and development.  He was the first in Britain to construct a recording Raman spectrometer (1948) and a hyper Raman spectrometer (1970).  He was the joint founding editor of the Journal of Raman Spectroscopy (1973 onwards), later becoming editor-in-chief.  His book, Raman Spectroscopy (1977), has achieved a considerable reputation and been translated into various languages.  A further book, The Raman Effect', was published in 2002.