Limnoria lignorum, commonly known as the gribble, is a species of isopod in the family Limnoriidae. It is found in shallow water in the North Atlantic and North Pacific Ocean where it tunnels into wood and attacks and destroys submerged wooden structures.

Trinity Chain Pier, originally called Trinity Pier of Suspension, was built in Trinity, Edinburgh, Scotland in 1821. The pier was designed by Samuel Brown, a pioneer of chains and suspension bridges. It was intended to serve ferry traffic on the routes between Edinburgh and the smaller ports around the Firth of Forth, and was built during a time of rapid technological advance. It was well used for its original purpose for less than twenty years before traffic was attracted to newly developed nearby ports, and it was mainly used for most of its life for sea bathing. It was destroyed by a storm in 1898; a building at the shore end survives, much reconstructed, as a pub and restaurant called the Old Chain Pier.