On 27 August 1883 the volcano known as Krakatoa, itself part of an island archipelago of the same name, was destroyed in an enormous explosion. The detonation’s blast is said to have been heard thousands of kilometres away, sending shock waves round the world several times.
They acted as a kind of copyright and were supposed to protect publications against unlawful reprinting by third parties: printer’s marks, also referred to as printer’s signets. They were added to books by the first publishers of printed material to label their source clearly. As there