Historical clue formulations

• *Hobbes, vis-à-vis Calvin — 2024-08-12
• Hobbes, in "Calvin and Hobbes" — 2016-02-10
• Hobbes in "Calvin and Hobbes" — 2008-02-01
• Childhood pal, perhaps — 2006-07-18
• Playmate for the lonely — 2005-04-15