leim/quail/*.el in "J" format, so how do non J people search them?

[Dan Jacobson]

Gentlemen, I can do
$ cd /usr/local/share/emacs/21.1/leim/quail
$ file *
But there is command to show me, at a glance, the coding system of
each file in the directory.  That is my first point. 2nd point is:

And if there were, one would be surprised that even the Chinese big5
.el files there are in "J" format (J -- iso-2022-7bit-unix), along
with the rest... so one can forget about grepping them from the shell
or passing them to non-emacs friends, unless they also live in J land
all day[?]

I wanted to search for the character '蜀' that I know how to type in
in big5.  How does one do fgrep '蜀' *.el there?

Sure, I can open the files one by one in emacs and use C-s, but how do
I make a M-x grep etc. do it all for me at once?
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