So many cultures
   make their dead 
      cross a river.

The Greeks' Styx.
 The Hindus' Vaitarna.
 The Norse Gjȍll.
 The Gnostic's Hiṭpon.
 The Japanese Sanzu-no-Kawa.
 The Mesopotamians' Hubur.
 Taoists cross Naihe Bridge --
     over what (I'm not sure, 
     but) is probably a river. 

No rest for the dead?
 It seems kind of rude.