From the The Universal Household Assistant or What Every One Should Know (1884):

Toast and Water. — This is the most wholesome, and, if properly made, palatable drink for children and invalids. Toast two or three thin slices of bread thoroughly, until they are quite dry and of a red-brown color — not burned. Pour boiling water on them, and add a small piece of lemon peel. When cold, strain off into a jug for use.