https://www.theguardian.com/science/2018/nov/07/the-gauls-really-did-embalm-the-severed-heads-of-enemies-research-shows
Original article (in French) available from https://www.researchgate.net/publication/299423908_L'exposition_d'armes_et_de_tetes_coupees_au_Cailar_Pratiques_rituelles_des_Celtes_du_Midi_au_IIIie_siecle_avant_notre_ere - the link in the Guardian article doesn't seem to work.
That,s why WRG Gauls are off their heads😉.
R
"Don't lose your heads chaps, it makes for a lot of extra work."
And when the stars go out
You can hear me shout
"Two heads are better than none,
One hundred heads are so much better
Than one".
Dearg Doom - Horslips
You're just Trouble with a capital T.... ;)