(original Dutch: 2 citaten van Jan Mankes, in het Nederlands:) ..[dat] het landschap direct of indirect een voorwerp van studie voor me zal zijn.. (1 maand later:) ..Zoo heb ik het reeds jaren beraamde en U bekende plan uitgevoerd (bijna) de Woudsterweg te schilderen.. .Daar heb je het al, landschap, Amice.

Paint studies of parts, for instance a piece of land, a group of trees or things like that, but always in a way that people can understand these things in relation with the whole landscape, by adding behind that group of trees the air in a right tone color and thereby in connection with the trees.. .Furthermore studies of a whole, preferably very simple subjects - A meadow with horizon and a piece of air to examine further the general tone color, the harmony of the whole.. ..and study nature even more by thinking about it than working after it. (translation from original Dutch: Fons Heijnsbroek)

I certainly believe that the simple landscape which seems less impressive is the nature that is most proper to paint. (translation from original Dutch: Fons Heijnsbroek)

I have finished a fairly large painting, the goat; I sometimes spoke to you about my plan. I believe it has become a real painting, and very complete. (translation from original Dutch: Fons Heijnsbroek)

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)

I learned from Nol that nowadays you [ Willem Witsen ] are especially engaged upon enlargements [of photos]. I would like to ask you if you perhaps have a piece of moorland (foreground) for me, I would be very grateful to you. Because I am working on a painting with a large foreground. You may have seen it, with that artillery in it. It must be a simple sloping ground. Without much frills of sand - etc. nothing but heather.. (translation from the original Dutch: Fons Heijnsbroek)

..when making a painting after a study, it costs me a lot of effort to follow this study very well. One is very much inclined to make something different, so-called better, and that's why people usually get confused. A good outdoor-study has a breath of nature in it which must not be neglected or destroyed. You have to get everything out of that study and not just a third or half. If you can really improve one or the other: a la bonheur, but otherwise it is advisable to follow the study obediently as a guide. (translation from original Dutch: Fons Heijnsbroek)

I have experienced this country of the great mountains [Switzerland] superb! .. ..[but] I positively believe that nature, most appropriate to be reproduced in painting, is the modest landscape which seems just ordinarily and very insignificant. (translation from original French: Fons Heijnsbroek)

I have studied the subject and painted it directly to nature [his painting 'Scheveningen strandgezicht / Scheveningen, beach view'] and I have tried to reproduce that motif simply and unaffectedly, with no desire to make a painting with a lot of 'éclat' [glow]. (translation from original Dutch: Fons Heijnsbroek)

Landscape is the work of the mind. Its scenery is built up as much from the strata of memory as layers of rocks... The book [Landscape and Memory] is a celebration of the improbable resilience both of the Earth and of the ability of these cultural contacts to survive the nightmares of late capitalism and late industrialization. I don't want to be understood as some anti-environmentalist, which I am most emphatically not, but I do have an argument with the notion that there is this determined history whereby technological society is necessarily going to mean oblivion for nature.

I have started a large landscape which is beginning to take shape.

..and then it remains you to re-create your study, the fragment, into a painting. For remember; these are two [different] things: Nature is the material from which we must take. But don't be fooled by the modern theories, that imitating, copying nature would be 'everything'. The goal, the Art's aim is .... to move.. (translation from original Dutch: Fons Heijnsbroek)

It is not my aim and object to paint a cow for the cow's sake or a tree for the tree's, but by means of the whole to create a beautiful and huge impression which nature sometimes creates, also with most simple means. (translation from the Dutch original: Fons Heijnsbroek)

[a landscape painter cannot do with] being stupid-natural.. ..all that art would be [made] in vain if the feeling stayed away. (translation from original Dutch: Fons Heijnsbroek)