Meaning of Phrase "Go Forth Without Day"

My early mentor James G. Headley would put this in at the end of an Affidavit or pleading on behalf of a corporate defendant.

"Further Affiant Sayeth Naught"

"Prays that he may go forth without day."

The meaning?

http://books.google.com/books?id=vlzlHKXT6D0C&pg=PA51&lpg=PA51&dq=meaning+of+phrase+without+day&source=bl&ots=rhPHNk-Ug7&sig=5fIRp20b-MsgFEMrtSjjcOM_GgA&hl=en&ei=8I_9SrqJOsGLnQfGiP2NCw&sa=X&oi=book_result&ct=result&resnum=2&ved=0CA8Q6AEwAQ#v=onepage&q=meaning%20of%20phrase%20without%20day&f=false