manuscript by Joannes de Gruytters
... that an 18th-century carillon-music manuscript by Joannes de Gruytters was discovered at a book auction?
... that an 18th-century <a href="./Carillon" id="mw3w" rel="mw:WikiLink" title="Carillon">carillon</a>-music <b id="mw4A"><a href="./De_Gruytters_carillon_book" id="mw4Q" rel="mw:WikiLink" title="De Gruytters carillon book">manuscript by Joannes de Gruytters</a></b> was discovered at a book <a href="./Auction" id="mw4g" rel="mw:WikiLink" title="Auction">auction</a>?