British Museum website: "The signature is probably not by Jan Brueghel the Elder (Brueghel usually signs with 'Jean' or 'Giovanni' and 'Brueghel' with 'h'). It is not clear if this quickly made sketch is a preparatory study for a painting or rather a 'ricordo' of a painting that had left the artist's studio; no painting showing the exact composition is known. Similar flower arrangements paintings are now in the Norton Simon Museum, Pasadena (inv.no.F.1972.13.P, attributed to his son Jan Brueghel the Younger) and others recently on the art market (see 'Old Master Paintings including the Henle Collection', Sotheby's London, 3 and 4 December 1997, p.81, under no.38; 'Importants Tableaux Anciens', Sotheby's Monaco, 2 and 3 December 1989, p.42, under no.322, p.41, fig.322 (also at Sotheby's New York 26 Jan. 2006 lot 17), and Sotheby's New York, 15 January 1993, lot 87."