Post mill at Heeswijk, side view

Post mill at Heeswijk, side view of 1904 takes the subject to a different windmill type and location from his Amsterdam-area mill studies — the post mill at Heeswijk in North Brabant was technically distinct from the cylindrical tower mills of the western Netherlands, its body rotating on a central post rather than having a rotating cap. The 'side view' designation indicates Mondrian's awareness that viewpoint transformed subject: the same mill seen from different angles offered different formal possibilities. The Brabant location connects this work to his other southern Dutch subjects from this period.

The post mill's distinctive structure — the main body elevated on the central post, balanced by tail pole — is rendered with attention to its technical character. Seen from the side, it presents a quite different silhouette from his tower-mill subjects: lower, more horizontal, the sails extending to left and right. The Brabant landscape around it is handled in warm, southern Dutch tones.