Question: Who is this Finnish composer and violinist of the late Romantic and early-modern periods that the Scottish music critic and composer Cecil Gray published books on?
Sentence (from "Cecil Gray (composer)"): He published books on the composers Jean Sibelius, Peter Warlock and Carlo Gesualdo, the last of these co-authored by the same Warlock; also a history of music, collections of essays on music, a play about Gilles de Rais and an autobiography.
Relevant evidence: Yes