Marijke Mooijaart is an editor of the Oudnederlands Woordenboek (Dictionary of Old Dutch) at the Leiden Institute of Dutch Lexicology, after having worked on the Woordenboek der Nederlandsche Taal (Dictionary of the Dutch Language) until its completion. She teaches historical linguistics at the University of Leiden. She has published articles on lexicography and word-history and is currently working, in co-operation with Stanisław Prędota, on an edition of the 16th-century collection of proverbs by Reyer Gheurtz.Marijke van der Wal is Professor in the History of Dutch (KNAW-Muller Chair) at the University of Leiden. Her publications cover the fields of both historical linguistics and the historiography of linguistics. She has published the Geschiedenis van het Nederlands (in co-operation with Cor van Bree) and De moedertaal centraal. Standaardisatie-aspecten in de Nederlanden omstreeks 1650. Her current research is focussed on egodocuments, in particular the Dutch 17th- and 18th-century sailing letters (National Archives, Kew UK), and the language history from below. The editors are preparing a manual for Middle Dutch and Early New Dutch which is due to be published in the second half of 2008.