The other guys beat me to it! It is indeed a coachmakers' anvil, made in 1842. That little side horn is the thing that makes it one. William Fosters are nice, because they are always stamped with the date they were made, which is rare on English anvils. It was made in the area northwest of greater Birmingham, England, called "The Black Country" for all the heavy manufacturing that went in back in the day. Somewhere in the vicinity of Wolverhampton or Dudley, if you look it up on a map.
It is made of wrought iron with a thin steel face. For this reason among others, trying