The Doctrine of Signatures. Word Search Puzzle Solver. The Doctrine of Signatures word Search Puzzle Game. Find words related to movie actors, actresses, and genres. Word Search Puzzle Solver. Matthew Wood discusses the Wisdom of Nature in presenting us with plant signatures that aid us in understanding the application of herbs as herbal medicines for your the health and well-being. Matthew takes you out into the fields to see the herbs in their natural habitat and explain the magic and the wisdom of nature from the roots to the flowers to the berries. This includes identifying and searching for words that are related to : Documentary, Matthew Wood .