in 1906 he was elected president of the royal society of british artists, a position he held until his death. in that year, he published his 107-page illustrated "the art of landscape painting in oil colour"; in its preface, he made the observation: "the greatest errors in landscape painting are to be found – contradictory as it may appear – not so much in the matter of technique as in the painter's attitude toward nature". in this book he described his techniques using colours, half-tones and pencil sketches.