▁of ▁a ▁large ▁block ▁of ▁el m ▁set ▁on ▁stone , ▁was ▁' ch rist ened ' ▁the ▁C en ot aph ▁of ▁Sig ism unda ▁by ▁their ▁friend ▁Charles ▁L idd ell . ▁He ▁was ▁a ▁li br arian ▁at ▁the ▁British ▁Museum , ▁and ▁a ▁cousin ▁of ▁Alice ▁L idd ell , ▁the ▁girl ▁who ▁inspired ▁Alice ' s ▁Advent ures ▁in ▁Wonder land . ▁He ▁was ▁probably ▁referring ▁to ▁the ▁trag ic ▁story ▁of ▁King ▁Tan cred ' s ▁daughter ▁Sig ism unda , ▁from ▁The ▁Dec amer on ▁by ▁Giovanni ▁B occ ac cio . ▁J ek yll ▁later ▁wrote : ▁ ▁Until ▁encounter ing ▁this ▁name ▁at ▁M unst ead ▁Wood , ▁L ut y ens ▁had ▁not ▁known ▁the ▁term ▁" cen ot aph ", ▁meaning ▁empty ▁tomb . ▁ ▁The ▁C en ot aph , ▁White hall ▁In ▁ 1 9 1 9 ▁the ▁Prime ▁Minister , ▁Lloyd ▁George , ▁asked ▁L ut y ens ▁to ▁design ▁a ▁c ata fal que ▁to ▁serve ▁as ▁a ▁temporary ▁mem orial ▁structure ▁in ▁White hall , ▁London . ▁Rec alling ▁the ▁term ▁he ▁had ▁first ▁heard ▁at ▁M unst ead ▁Wood , ▁L ut y ens ▁proposed ▁that ▁a ▁c en ot aph ▁would ▁be ▁more ▁appropriate . ▁His ▁proposal ▁was ▁accepted , ▁and ▁used ▁for ▁both ▁the ▁ 1 9 1 9 ▁structure ▁and ▁its ▁permanent ▁replacement ▁in ▁ 1 9 2 0 , ▁The ▁C en ot aph , ▁which ▁there after ▁became ▁the ▁principal ▁war