It is now 50 BC, and we can trade Horseback Riding and Priesthood to the Romans, in exchange for getting Mathematics. I think this is a reasonable trade. It's not equal in beakers, but it is the smallest amount in Rome's favor which is possible. With this trade, forest chops will be worth their full value, and we can research Construction or Currency.
There aren't any interesting resource trades, but the trading screen reveals we're in a temporary position of being the only ones with iron.
There aren't any interesting resource trades, but the trading screen reveals we're in a temporary position of being the only ones with iron.