3. This is the planned drawing of potato lifting; see letter 353.
4.Van Rappard was working on a drawing of a forge in which rollers could probably be seen. Cf. exhib. cat. Amsterdam 1974, p. 82, cat. nos. 94-95.
5. Van Gogh admired the naturalism and realism of the writers named; they did not idealize the hard reality of a factory or workshop.
6. Besides the drawing of diggers on which he is working, Van Gogh means the five large drawings he had done in recent weeks: Peat diggers in the dunes (F 1031 / JH 363), a sand quarry (‘workmen labouring’), two versions of the refuse dump and a scene at the coal yard at Rijnspoor station. Except for the first, these drawings are not known.
7. Lamp-black, which contains a fine-grained, deep black pigment.