Listed in this set are one hundred and eighty-two public sales of paintings in Amsterdam, Rotterdam, Leiden, The Hague, Delft, and other Dutch cities. The main index by artist contains references to more than seventeen thousand paintings, many of which have been traced to their current Locations in museums and private collections. This impressive list of traceable pictures includes Jan Vermeer's Music Lesson, now in the Frick Collection, Paulus Potter's Piebald Horse, now in the Getty Museum, and Jan Steen's Concert, now at the National Gallery in London.