This one is not really old - not older than 30 years, but still well worth your attention as a rare example of Portuguese snuff. Rape Ingles Cephalico (English Cephalic snuff), made in Azores by Fabrica de tabaco Micaelense (Ponta Delgada, Sao Miguel).
Apparently, it was fine dry snuff - as seen in the last photo, uploaded by seller at https://www.todocoleccion.net/coleccionismo-tabaco/paquete-rape-fabrica-tabaco-micaelense-ponta-delgada-sao-miguel-acores-portugal-azores-aspirar~x134320110?fbclid=IwAR36TyzBMTTJe6-23DuvGwqk75KcfXxzfzESDlTxedVmq6Z7l\_ssK3xl7-4, current gross weight is 52 g (net weight indicated on the package - 50 g), so pretty much no moisture loss.
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Some info about genuine English cephalic snuff: https://www.british-history.ac.uk/no-series/traded-goods-dictionary/1550-1820/celandine-cephalic-snuff
And here’s one cephalic recipe, super easy to reproduce: “Boeli’s Cephalic Snuff consists of 2 drachms valerian, 2 drachms snuff, 3 drops oil of lavender, 3 drops oil of marjoram; mix. This is said to relieve the eyes as well as the head.” https://chestofbooks.com/reference/Encyclopedia-Of-Practical-Receipts-And-Processes/Patent-and-Proprietary-Medicines-Part-20.html (1 drachm - 3.89 g).
A photo of True Cephalic Snuff bottle (full): http://whitney.med.yale.edu/gsdl/cgi-bin/library?c=medinst&a=d&d=DmedinstbkBBCCAB
Empty bottle of True Cephalic Snuff (c 1850-1855): https://americanhistory.si.edu/collections/search/object/nmah\_728170
https://www.antique-bottles.net/threads/true-cephalick-snuff-by-the-kings-patent.384163/page-2 - scroll down to post #16 to see a photo of a huge Cephalic bottle.