Here is an excellent article on the development of perspective for those of you who want to know more.
http://www.op-art.co.uk/history/perspective/

But let us conclude today's Blog with the work of Alfred Wallis, the Cornish fisherman turned painter introduced in yesterday's Blog.

At first artists used one vanishing point but later multiple vanishing points were mastered. In this painting Wallis has applied some knowledge of two point perspective to the large house which is the central object of the painting and therefore the most significant aspect. The two small cottages to the side which are relatively unimportant are flat with no perspective. The large house on the hill also appears flat. Perhaps Wallis was becoming more accurate in copying from real life or perhaps he was becoming more knowledgeable of perspective and applied it for emphasis.