Four different styles of 1/4" chisels

[Peter Travis]

Here are four different styles of chisels.
I know the thinnest is a paring chisel. I'm guessing the thickest is a mortise chisel. I'm not sure what the two middle ones are.
Does anyone have any ideas?

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Chisel details from top to bottom (all are 1/4"):
1. TH WITHERBY (for length reference this one is 11")
2. USA (other side has ___ EDGE TOOL WORKS ___ CONN US__
3. THE JAMES SWAN CO (I think)
4. Robert Sorby 6mm/ 1/4" Shefield England

[James Owen]

The top three look like sash mortise chisels.

[Archie England]

Top profile looks like a heavy sash mortise chisel, maybe even a mortise -- but all mine have heavy tangs not sockets.
Middle two, I agree with James--sash mortise chisels
Bottom--looks like a paring chisel

[Trevor Walsh]

I think the top two are those common as dirt no handle chisels, very bad users, hard to grip, dig into your mallet... better send them this way...ha

[Peter Travis]

thanks guys-