argus file format magic for file (1)

As part of our DLP efforts, I use file to identify certain files that
could have potentially sensitive information laying about.  Has anyone
created a definition for file to identify argus files ?

e.g. I can use file to programmatically figure out the file "misc-stuff"
is a pcap file

# file misc-stuff
misc-stuff: tcpdump capture file (little-endian) - version 2.4
(Ethernet, capture length 262144)
#

Where as argus data, no such luck

# file suspect.arg
suspect.arg: data
#

Has anyone created a magic definition for argus data ?

	---Mike