“Chestnut” in English covers two unrelated trees, and once you know that the compound leaf belongs to the horse chestnut you cannot un-see which one each painter actually stood in front of. Maclise put Friar Tuck under a horse chestnut in 1839; Sisley’s avenue at La Celle-Saint-Cloud is the other. There is also a precise date for when British children started smashing conkers instead of hazelnuts: 1848, Isle of Wight.