Mid-summer ... when the alchemy of Nature transmutes the sylvan landscape to one vivid and almost homogeneous mass of green; when the senses are well-nigh intoxicated with the surging seas of moist verdure and the subtly indefinable odours of the soil and the vegetation. In such surroundings the mind loses its perspective; time and space become trivial and unreal, and echoes of a forgotten prehistoric past beat insistently upon the enthralled consciousness.