Take, when empty, one of the little bottles that has contained indelible ink, such as is sold in cases. and wash and rinse it clean. Put into it two inches of lunar caustic; fill it up with soft water and cork it tightly. This is the marking ink.
Prepare the larger bottle that has contained the liquid used for the first wash, by making it quite clean. Take a large tea-spoonful of salt of tartar, and a lump of gum arable the size of a hickory nut. Put them into the wash bottle, and fill it up with clear rain water. Cork both bottles tightly, and set them three days in the sun. Always put them in the sun before using it.
Linen cannot be marked well with durable ink unless the weather is clear and dry. Dip a camel's hair pencil in the large bottle that contains the gum liquid, and wash over with it a small space on a corner of the linen, about large enough to contain the name. Dry it in the sun, and let it alone till next day. Then take a very good pen, and with the ink from the smallest bottle, write the name you intend, on the place that has been prepared by the first liquid. This also must be dried in the sun. See that the bottles are always well corked, and keep them in a covered box. After the linen is dried, iron it before you write on it.