chunk: As Mary is exploring the periphery of the gardens, her robin friend draws her attention to an area of turned-over soil. Mary finds the key to the locked garden, and eventually the door to the garden. She asks Martha for garden tools, which Martha sends with Dickon, her twelve-year-old brother. Mary and Dickon take a liking to each other, as Dickon has a kind way with animals and a good nature. Eager to absorb his gardening knowledge, Mary lets him in on the secret of the garden.