Ian built this set up for the Dublin Irish Festival where we recreated Ireland in the year 1005. 

Ian dug a pit in the ground and used his double bellows set up to heat the forge. Using the two bellows is very important as one has to go up as the other goes down to keep an even airflow. Otherwise you risk the hot gasses being pulled into the bellows and being ignited by a piece of hot charcoal. Let me tell you from an earlier experiment that a fireball in your lap is no fun.   Our anvils were small squares of steel no more than a couple of pounds and a bic hammered into a stump to use for a horn.

The Irish nails are forged from small socketed chisels. The shaft is a 3 ft long oak dowel. The picture does not show the whole shaft, as it's not all that exciting. The darts were burned onto the shaft and then we used pine pitch collected from a tree to adhere the socket to the shaft.