A different story with this same title appears in "Dennis the Menace" #66.
A different story with the same title appeared in "The Best of Dennis the Menace" #4. A third story with the same title appeared in "Dennis the Menace Giant" #51.
This takes place at Henry's office Christmas party. Henry works at "R.M. Hall Enterprises" (as in Hallden) and the party shot includes caricatures of some of the Hallden bullpen.
Different stories with the same title appeared in "Dennis the Menace" #31 and "Dennis the Menace" #32. A line of Dennis the Menace hand puppets were available in toy stores at this time.
Dennis' letters to Santa were a semi annual event. A few additional letters were printed over the years.
A different story with the same title appears in "Dennis the Menace Christmas Issue" [nn].