In my last editorial I paid tribute to my predecessors, particularly Reinhard Kopiez, who took over as editor-in-chief from Jukka Louhivuori in 2013 and stepped down at the end of 2018. I made an error, however, in naming John Sloboda as a previous editor-in-chief. This was entirely my mistake, for which I apologise. The journal's Founding Editor was, of course, Irène Dèliege, who also served as General Secretary of ESCOM between 1991 and 2009. In this editorial I should like to take the opportunity to thank Irène and celebrate her invaluable contribution to Musicae Scientiae from 1997 until 2009. Under Irène's editorship, two issues of Musicae Scientiae appeared every year. In addition a third, guest-edited, Special Issue was published most years, "with the aim of gathering together significant contributions around the given theme that would enable readers to gain a sense of the state of the art in that area of literature", as Irène wrote in her editorial for the 2009-2010 Special Issue. Typically, but not exclusively, these included articles deriving from presentations given at ESCOM symposia or conferences. Topics ranged from interdisciplinary approaches to the cor anglais solo in Tristan und Isolde (1998) via musical creativity in ESCOM's special 10th anniversary issue ( 2003) to music and evolution (2009). In addition, Irène introduced Discussion Forums "[taking] the form of debates around a central topic or a series of critical commentaries centred on the publication of a significant book" (Deliège, 2009). The first Discussion Forum, L'Afrique et l'Europe médiévale, was published in 2000, having been inspired by Simha Arom's article 'The "syndrome" of African pentatonicism' (Arom, 1997) and a colloquium on the same topic organised by ESCOM in conjunction with CNRS Laboratoire Langue-Musiques-Sociétés in Paris later that year. The second Discussion Forum consisted of responses to Nicholas Cook's Music: A very short introduction (1998) and was published in 2001, followed by Discussion Forums on aspects of time in the creation of music ( 2004) and similarity perception in listening to music (2007 and 2009). The last Discussion Forum for which Irène was responsible was published in 2010 and focused on Lerdahl and Jackendoff 's A generative theory of tonal music (1983).2010 also saw the publication of a Special Issue of Musicae Scientiae in honour of Irène herself and her contribution to the field. The issue contains a preface by John Sloboda, the transcript of an interview with Irène conducted by Jukka Louhivuori, a list of Irène's own publications and the events she had organised to date, and 15 articles by colleagues reflecting different aspects of her research interests.