Heterodyne family crypt

The Heterodyne Family Crypt lies deep beneath Castle Heterodyne, and is accessed by following serpentine tunnels. It contains, according to Carson von Mekkahn, all the Heterodynes (presumably, however, Bill or Barry as yet), who return home eventually.

The most recent interred Heterodyne is Klaus Barry Heterodyne, Agatha's older brother, who died as a toddler.

List of Entombed Heterodynes
(I'll add this this evening)