Indelible Ink

Take 1 part sal ammoniac, 1 part verdigris, 1/2 part lampblack, and 10 parts of water; mix thoroughly together and keep in a glass-stoppered bottle; shake before using; write with a medium-pointed steel pen. Another useful ink can be readily made by dissolving half a teaspoonful of sulphate of copper in an ordinary penny bottle of writing ink; use with a quill pen.
Garden Recipes from The Horticultural Note-Book


You may have guessed that these are all varieties of tomatoes.