55 Years Later, Alcatraz Escapee sends this note.

The Tight Squeeze

By the time May 1962 arrived, the Anglin twins and Frank Lee Morris were at last ready to tear through their separate cell walls. It was all they needed to start their escape plan, even if the holes were just barely large enough to fit in after months of nibbling away at them.

To create one unit, they stitched and glue four separate raincoats together building a raft with life vests. Once they had completed their strategy totally, they used fifty raincoats to build the items they required. Every single one (1) was required; else, they would sink in the sea.