George Washington's Rules of Civility Traced to their Sources and Restored by Moncure D. Conway
Chapter viii. 32. Ne boiuez ayant le morceau en la bouche, ne
demandez point à boire, ne parlez, ne vous versez point à boire, & ne boiuez cependant que vostre voisin boit, ou celuy qui est au haut bout.
33. En boiuant, ne regardez point çà & là.
[Sidenote: The later French book recommends keeping the eyes 'fixed at the bottom of the glass' while drinking.]
Do not drink with your mouth full of food; do not ask anything while drinking, nor talk, nor turn round; and do not drink because your neighbour does, or the head of the table. (33.) While drinking, gaze not here and there.
99th. Drink not too leisurely nor yet too hastily. Before and after Drinking wipe your Lips breath not then or Ever with too Great a Noise, for its uncivil