▁is ▁the ▁only ▁C age - C unning ham ▁collaboration ▁from ▁the ▁ 1 9 4 0 s ▁for ▁which ▁original ▁ch ore ography ▁has ▁surv ived . ▁ ▁And ▁the ▁Earth ▁Sh all ▁Bear ▁Again ▁ ▁Com posed ▁in ▁ 1 9 4 2 ▁for ▁a ▁dance ▁by ▁Val erie ▁B ett is . ▁Ten ▁individual ▁notes ▁are ▁prepared , ▁mostly ▁with ▁small ▁sc rew s , ▁and ▁a ▁whole ▁range ▁from ▁G 1 ▁to ▁C 3 ▁is ▁prepared ▁using ▁" two ▁thick ness es ▁of ▁w ool en ▁material ". ▁ ▁This ▁material ▁is ▁placed ▁between ▁the ▁strings ▁in ▁the ▁following ▁manner : ▁over ▁the ▁first ▁string , ▁under ▁the ▁second , ▁over ▁the ▁third , ▁under ▁the ▁fourth , ▁etc . ▁ ▁Prim itive ▁Com posed ▁in ▁ 1 9 4 2 ▁for ▁a ▁dance ▁by ▁Wilson ▁Williams . ▁Th ir teen ▁notes ▁are ▁prepared , ▁all ▁using ▁sc rew s ▁or ▁bol ts . ▁ ▁In ▁the ▁Name ▁of ▁the ▁Hol oca ust ▁ ▁Com posed ▁in ▁late ▁ 1 9 4 2 ▁for ▁a ▁dance ▁by ▁Mer ce ▁C unning ham . ▁The ▁title ▁references ▁World ▁War ▁II ▁( like ▁in ▁the ▁lost ▁prepared ▁piano ▁work ▁L id ice ▁( see ▁L id ice ) ▁from ▁ 1 9 4 3 ). ▁ ▁P iano ▁prepar ation ▁involves ▁only ▁sc rew s ▁or ▁bol ts . ▁Vari ous ▁extended ▁techniques ▁are ▁used , ▁such ▁as ▁producing ▁sound ▁by ▁pl uck ing ▁strings . ▁ ▁The ▁piece ▁starts ▁with