Richard Joseph Beamish, History of the World War, Vol. 3
“ An officer who had the curious idea of putting his ear to the ground said it was as though the earth were being smitten great blows with a Titan's hammer. After the first few shells had plunged screaming amid clouds of earth and dust into the German trenches, a dense pall of smoke hung over the German lines. The sickening fumes of lyddite blew back into the British trenches. In some places the troops were smothered in earth and dust or even spattered with blood from the hideous fragments of human bodies that went hurtling through the air. ”
