Thanks again for all your help, macropod.

I believe I figured out the problem, though I may have a difficult time explaining it clearly.

Here goes:

The .Text = "[!0-9],*>" line, generally, is fine. When I change [!0-9] to ?, reading .Text = "?,*>", the macro finds numbers as well as letters.

However, in the second example I gave,

In re Grand Jury Empanelled January 28, 2004, 401 F.3d 247

When "8, 2004" is found, the macro recognizes that the comma here should remain in italics. But it then jumps past the "4, 401" phrase, I believe. This seems to be because the "4" in 2004 is already part of the preceding range.

To give another example, when I run your original macro in a document with the text,

FW/PBS, Inc. v. City of Dallas, Texas, 493 U.S. 215

the comma after Texas remains in italics.

There seems to be an issue with how the macro is identifying ranges.

Help if you can. Thanks.