While I'm sure this topic has probably come up before, it's definitely something worth noting. I love crafting systems in games, and it's always one of my favourite part of games that have one. I think a great addition for the crafting in this game would be a subsection of the crafting part of the journal, dedicated to listing the successful combinations you have made so far.
Just a simple, short entry for each such as "I tried combining arrow shaft and knockdown arrowhead, and it created Knockdown Arrow!"
Or even just a page with dot points and "X + Y = Z"
"Hair + Hair = Thread"
"Axe + Log = Branch + Wood Chips"
Etc. I think that any player who put a lot of time into crafting would eventually get frustrated trying to remember the specific combinations needed to make basic items or precursors for more important items, especially once you get into the less intuitive combinations.
Already I've (on several occasions) accidentally made the wrong items by making close-but-different combinations (such as trying to make a spear but accidentally making an arrow shaft instead because you used the knife not the dagger).
