Coming back to first line

From: Linux Man (steven_82m_at_hotmail.com)
Date: 03/23/04 

Date: 23 Mar 2004 01:35:05 -0800

Hi

I have an input stream created by "see(myfile)."
and after some "read(X)." I'm at the end_of_file.
How can I come back to he first line?

Thanks