Ravenal's Tower is the resting place of Richard Ravenal (1720-1779) outside of Ivybridge. Here Ravenal was cursed that he could be buried neither by earth nor sea, and thus his body resides in an octagonal room halfway up his tower.
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Ravenal's Tower and Richard Ravenal are from E. Nesbit's The Wouldbegoods (1901).