There is still some study [to do] here for the Dutch landscape, and I believe the best I can do is to stay some time longer. (translation from original Dutch: Fons Heijnsbroek)

Quote of Roelofs in his letter from Schiedam, Summer 1865; as cited in Zó Hollands - Het Hollandse landschap in de Nederlandse kunst sinds 1850, Antoon Erftemeijer; Frans Hals museum | De Hallen, Haarlem 2011, p. 16 | in the Summer of 1865 Roelofs was visiting Schiedam and its surrounding polders. In 1866 he came back here, for making his sketches in open air