I have been deeply interested during the last ten years in the use of colour with form. I have applied oil colour – white, grey, and blues of different degrees of tone.... I have been very influenced by the natural colour and luminosity in stones and woods and the change in colour as light travels over the surface contours. When I pierced the material tight through a great change seemed to take place in the concavities from which direct light was excluded. From this experience my use of colour developed.

p. 279 - 'The Studio 132:643', (1946)