It is not to be thought of that the Flood

It is not to be thought of that the Flood
Of British freedom, which to the open Sea
Of the world's praise from dark antiquity
Hath flowed, "with pomp of waters, unwithstood,"
Road by which all might come and go that would,
And bear out freights of worth to foreign lands;
That this most famous Stream in Bogs and Sands
Should perish; and to evil and to good
Be lost for ever. In our Halls is hung
Armoury of the invincible Knights of old:
We must be free or die, who speak the tongue
That Shakespeare spake; the faith and morals hold
Which Milton held. In every thing we are sprung
Of Earth's first blood, have titles manifold.