In the New Receipts for Cooking by Miss Leslie ©1854 you'll find lots of recipes for general food cooking. However in the middle chapters of the book are recipes for Perfumes, Remedies, Laundry-work, Needle work, etc. One of the perfume recipes for hair is listed below: Millefleurs literally means a thousand flowers.
MILLEFLEURS PERFUME.—Mix together an ounce of oil of lavender; an ounce of essence of lemon; an ounce and a quarter of oil of ambergris; and half an ounce of oil of carraway. Add half a pint of alcohol, or spirits of wine, which should be of the inodorous sort. Shake all well together. Let it stand a week, closelycorked, in a large bottle. You may then divide it in small bottles.
By mixing this perfume with equal quantities of olive oil, and oil of sweet almonds, instead of alcohol, you will have what is called millefleurs antique oil, which is used to improve the hair of young persons.
This began a search for me about the various hair treatments of the 19th century on Monday I'll continue to share what I've learned so far.