This strip sees the first appearance (in this version of the comic anyway) of Thalia, named after the muse.
Here's a bit of what Wikipedia has to say about the muse Thalia:
"In Greek mythology, Thalia or Thaleia ("good cheer") was the muse of comedy and pastoral poetry. She was a rural goddess with the attributes of a comic mask and a shepherd's crook. Thalia is also the name of a character in William Shakespeare's play Pericles, Prince of Tyre."