<p>Fremantle Prison
</p>
the steel hinge of an isolation with an arrow mark that was put on all work done by convicts in WA
<a href="//commons.wikimedia.org/wiki/User:Gnangarra" title="User:Gnangarra">Gnangarra</a>
CC BY 2.5 au
<span class="int-own-work" lang="en">Own work</span>