Dartmouth Harbour
... that an artillery blockhouse was built in 1481 to protect Dartmouth Harbour?
... that an <a href="./Artillery" id="mwBb8" rel="mw:WikiLink" title="Artillery">artillery</a> <a href="./Blockhouse" id="mwBcA" rel="mw:WikiLink" title="Blockhouse">blockhouse</a> was built in 1481 to protect <b id="mwBcE"><a href="./Dartmouth_Harbour" id="mwBcI" rel="mw:WikiLink" title="Dartmouth Harbour">Dartmouth Harbour</a></b>?