I am searching for a tone, which we call 'colored grey'. I mean that all colors, even the strongest, can be brought together in such a way as to give… - Gerard Bilders

Yesterday I received a letter from my father [ Dutch landscape-painter J. W. Bilders.] He told me to come at once, to paint the goats in a rather large forest landscape-painting he just finished, which has to be sent away at once [to Saint Petersburg, Russia]. I earn back my travelling [from Leiden to Amsterdam, probably by travel coach] but will loose one day studying in open air. When my goats will succeed, and they are not too stubborn, I'll be back here [in Leiden] tomorrow at one o'clock in the afternoon.

Friday 11. I have found there [at the [[w:Mauritshuis|museum 'Mauritshuis'] ]] already refuge - in front of Potter's big Bull. That is I started to copy the sheep with the lamb, which will not be a easy task, notwithstanding its great simplicity. The longer I look at that painting, the more beautiful things become visible to me, and when I wasn't convinced for sure that I was sitting in front of my painting easel in The Hague at the Mauritshuis, I would believe that the animals were alive and were - just as in the meadows in Oosterbeek - staring at me with their stupid faces, and asking: - what are you doing there? (translation from the Dutch original: Fons Heijnsbroek)

version in original Dutch / citaat van Gerard Bilders' brief, in het Nederlands: Uwe opmerking, dat in den strijd tegen de natuur reeds een gedeelte der kunst ligt, vind ik volkomen juist, en regt aangenaam is reeds het gevoel, waarmede men als overwinnaar terugkeert uit kleine schermutselingen, hoewel men zich in den grooten slag toch steeds als verslagen gevoelt. Zoo als u mij aanraadt, heb ik schetsen van luchten gemaakt, het effect er in aangeduid en de voornaamste kleuren er bij geschreven; ik ben dan nu ook in een klein luchtje wat beter geslaagd; men vindt het ten minste.