Praca Zaka z dobrą proweniencją, dobra historią wystawienniczą i jest to dobra jego praca. Będzie tylko coraz bardziej droga.

Eugène Zak Polish 1884 – 1926. Le prisonnier , signed Eug. Zak lower right, oil on canvas. Unframed: 60.3 by 73cm., 23¾ by 28¾in. Framed: 77 by 90cm., 30¼ by 35½in. Provenance: Galerie Zak, Paris, Spencer Kellog, Jr., Eden, New York, by 1928. Sale: Sotheby’s, New York, 29 September 1994, lot 80. Purchased at the above sale by the present owner. Exhibited: Buffalo, Buffalo Fine Arts Academy, Paintings and Drawings by Eugenjusz Zak, Ceramics by Mika Mikoun, 1928, no. 4 New York, International Art Center of the Roerich Museum, 1930, no. 6 . Estimate 120,000 – 180,000 GBP. Sotheby’s. 11/09/21. Not sold