pg_xlog

Hi,

Is there a way to translate information in pg_xlog files to a more
readable format?
Basically we have someone accidentally emptied a text column containing
quite a large amount of text, and unfortunately have no backups. I know
the pg_xlog is for WAL, and probably is not the proper way to restore a
lost data. but I find some of the text in one of the files in pg_xlog
directory. I can get the text part but there are also non text
characters. So just wondering if there is a way to interpret the non
text characters.

thanks,
- reynard