"Jericho"

In the impromptu version of "Jericho" from the Headquarters sessions (listed as "Joshua Fit the Battle of Jericho" on the super deluxe edition), there are the lines:

You can talk about your men of Gideon

You can talk about your men of Saul

But there's none like good old Joshua

At the battle of Jericho

The contrast between the nearly identical first two lines and the line about Joshua highlights his uniqueness ("there's none like... Joshua").

I neglected to note this before, but the Biblical event that the song relates is recounted in Joshua 6.  "Your men of Saul" seems to be just a general allusion, but "your men of Gideon" refers to Judges 7, in which Gideon and three hundred men attack the Midianites.  Like Joshua's attack on Jericho, Gideon's attack was also preceded by the blowing of trumpets.

"Mr. Webster"

I listened to the deluxe edition of Headquarters last month and noticed a few small features.

Halfway through the line "Said, 'Sorry stop.  Cannot attend'" in "Mr. Webster," there's a rest in the vocal and instrumental parts, mirroring that "stop" in the telegram.

In the first recorded version (available as a bonus track on the deluxe edition of More of the Monkees), there's a rest in the vocal but not in the instrumental parts.