If you still need this info (and if it hasn't been wiped out or otherwise lost), perhaps there is a parallel system that logged this info - OS for the storage (i.e. record in the data files created), or as others said, OS event logs. But that is just a wild guess on my part.
Good luck.
- webrunner
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A SQL query walks into a bar and sees two tables. He walks up to them and asks, "Can I join you?"
Ref.: http://tkyte.blogspot.com/2009/02/sql-joke.html