Two Sketchbooks with (1) nineteen Studies of Dune Landscapes, woods and trees and (2) forty-five studies of trees, farms, cattle, ducks and figures

Sientje married H.W. Mesdag (1831-1915), a banker, collector and artist himself, in 1856. The couple moved to Brussels in 1866, returning to Holland in 1870, settling in The Hague. As their only child died they decided to give their extensive Collection and part of their work to the State, housed in the Museum Panorama Mesdag, The Hague. In her unpublished dissertation Sientje Mesdag-van Houten, leven en werken in de schaduw van H.W. Mesdag, Amsterdam, 1997, S. de Clerq discussed the work and life of Sientje (copy in the Rijksbureau voor Kunsthistorische Documentatie, The Hague)