Mudcat is full of mysteries, some of which nobody alive seems to remember, let alone to reveal to us mortals. Whoever grasps a hint is welcome to share it with the congregation.

By the way, even humble guests can produce simple tables in Monique's style without using HTML5 grids:

Nouvè Notre-Dame des Doms 2-8   
QUITEN AQUESTO PLASSO
(Provençal lyrics)

Quiten aquesto plasso
Intren dins l'establon
Los ousselons s'amasson
Per dire sey cansons

Notre-Dame des Doms Carol 2-8
LET'S LEAVE THIS PLACE
(English translation)

Let's leave this place,
Let's enter in the small stable,
The birdies gather
To sing their songs.