Well, we're a week into October and its been a while since I put out any more fancy cancels. How about something seasonal to the month this time? The stores are gearing up with spooks and goblins, and soon the houses will be decorated with spider webs, skeletons and carved pumpkins. There's a cancellation for that.

top row, L-R
1 Smiling pumpkin mask
2 Jack-O-lantern
3 dog/wolf mask
4 larger sun face (St. Louis)
5 Devil mask on 6c (New York)
Bot row, L-R
1 Hand carved Skull and crossbones
2 Man in coffin (Harrisburg, PA)
3 Skull and crossbones (ready-made)
4 Skull and crossbones (late) (ready-made)
5 Profile head and neck (man facing right)
Comments:
top
what I am calling a wolf mask is unquestionably a mask of some sort, but is not listed in Cole.
The St. Louis sunface here is of a larger size than the one I showed in group 2 above, and is either interrupted by a four-bar grid, or has a halo but also with 4 rays emanating out from the face. (My money is on the four bar grid.)
The devil mask is of the type Cole lists as JO-90, but is unusual on this denomination.
bottom
The ready-made skull and crossbones here were sold to postmasters for use with their cancellers.
The stamp with the profile figure has a cert for the cancel. Not sure what it corresponds to in the existing catalogs. [edit: I should have looked at the cert again. It equates to JO-135 in Cole. And sure enough it looks like it.]
I thought I would supplement these with a few examples on cover.

1c shows a ready made skull and crossbones in duplex with the famous West Gardner MA shield. The bones are beneath the skull but obscured by the deeper shading of the stamp.
2c shows a negative feature skull and crossbones in which the bones cross behind the skull.
3c shows the full version of the devil mask design which Cole lists as JO90.
Trick or Treat!
Added: This little guy just arrived in the mail and looked so forlorn I just had to include it with the others

Hand carved, but would you call it a one-eyed skull and crossbones?