Friday morning.
The Herweghs have invited themselves for this evening. If you think it would help you to recover from the exertions of your last invitations, it would much delight us if you consented to take part in our entertainment.
Kindest regards.
R. W.
Source: Richard Wagner to Mathilde Wesendonck, trans. William Ashton Ellis (Charles Scribner's Sons, 1905), No. 6