The collection of letters, telegrams, and instructions was the property of the late Reginald Parker. It was found by a furloughed clerk in a jigsaw box during a home clear-out.
The corroded helmet would have been an essential component of protection for any Viking warrior. Several iron bands and plates, riveted together, would shield the wearer during the violent clashes for which the warriors are renowned.
The bunker, under the village of Wijtschate in Flanders, is more than 20 feet underground and is believed to have accommodated up to 300 troops.
The U-boat went down with all hands and has rested on the seabed, some 37km (23 miles) off the coast of Yorkshire, ever since.
A new hull walkway, opened in August of this year, allows enthusiasts to descend into the base of the ship’s dry dock and view the vast craft from below.
This unique ship is the last of over 800 tank-carrying landing craft to have served at D-Day, the amphibious Allied assault on Normandy on 6 June 1944.
During a training session in the English Channel in May 1878, SMS Grosser Kurfürst was accidentally rammed by another German warship, SMS König Wilhelm, while attempting to avoid a collision with two sailing ships.
The small building in the town of Braunau am Inn, close to the border with Germany, will be redesigned by an Austrian architectural firm in order to deter further neo-Nazi visitors.
The research, published in the journal Britannia, is expected to aid understanding of how Wales was conquered and dominated 2,000 years ago.
The images, released earlier this spring to commemorate the 75th anniversary of VE Day, show two amphibious vehicles undergoing tests in the lake by Blenheim Palace.