In his black watercolours he laid layer after layer of black, almost transparent paint on the paper and in the superimposition of the layers he achieved a nuanced gradation of light and ark. In "Bucket and watering can", 1910, he continued this process in gentle watercolour tones. Here too he placed almost transparent layers of colours side by side and above all over one another. In the process the motif gradually disappears in the flatness of the application of paint. The outlines become vague, as they often flow together with the surroundings. There is a complete lack of drawn detail. The fleeting nature of the composition and its high level of abstraction recall Japanese ink-wash painting.