This plaque is installed on the western entrance to Boston Common, bordering the Public Garden.  It is a token of gratitude from the Royal Navy to the people of Boston, for their hospitality during World War 2. 
<p>Inscription:
"Erected by
THE ROYAL NAVY
in gratitude to
the people of Boston for
hospitality and friendship
to many thousands
of British sailors
from H.M. ships
building and refitting
during the
Second World War
</p>
1945."
<a href="//commons.wikimedia.org/wiki/User:Nemilar" title="User:Nemilar">Nemilar</a>
<span class="int-own-work" lang="en">Own work</span>