((** I've discovered that barley is normally used to make mead, although I can not find if barley is on Gor or not, if not, would someone please let me know))
Never seen any mead made with barley to be honest. Is why its called "honey wine". Honey, water, yeast are the ingredients and what other spices you wish to put in.
If you like more information, google can help you.
Raz