The pair:
Jan (1680-1771) and Pieter (1690-1758) Bisschop, Rotterdam
Purchased in 1771 from the estate of the above Jan, along with the entire picture collection, by Adrian (1709-1781) and his nephew John Hope (1737-1784), Amsterdam
By inheritance after Adrian Hope's death to John Hope, Amsterdam and The Hague
By inheritance to his sons, Thomas Hope (1769-1831), Deepdene, near Dorking, Adrian Elias Hope (1772-1834), and Henry Philip Hope (1774-1839), Bosbeek House, near Heemstede, and, as of 1794, London, where the collection was in possession of John's cousin, Henry Hope (c. 1739-1811)
By inheritance in 1811 solely to Henry Philip Hope, Amsterdam and London, but in possession of his brother, Thomas Hope, Deepdene
By inheritance in 1839 to Thomas' son, Henry Thomas Hope (1808-1862), Deepdene
By inheritance to his wife Adèle, née Bichat (d. 1884), London
By inheritance to her grandson, Henry Francis Hope Pelham-Clinton-Hope, 8th Duke of Newcastle-under-Lyme (1866-1941), Deepdene
Charles Davis, London (by whom presumably acquired directly from the above)
His sale, London, Christie's, 3 December 1920, lot 89
Anonymous sale, Paris, Galerie Charpentier, 12 June 1936, lots 13-14, no. 5
Anonymous sale, Monaco, Sotheby's, 18 June 1992, lot 42, where acquired by the present owner.
The latter:
Collection of C. Reygersbergen van Cauwerven, Middelburg, 1752
His sale, Leiden, v. d. Eyk, 31 July 1765, lot 37 (bought by Bisschop for 400 florins)
The former:
Anonymous sale, Amsterdam, de Leth, 11 May 1756, lot 18 (bought by Bisschop for 180 florins)