Asp Forms And Variables

I am passing a variable from one asp page to another say "land registry". It puts the variable in the URL (as land%20registry) as you'd expect. I want to add it to a hidden text box in a form so that I can then pass it back (eliminating the need to store this original search variable in a cookie).

However even though I can response.write the variable as "land registry" on the new page, so I know the variable is correct once its passed - it puts it in the text box on the form as just "land" so then when it passes back from the GET action of the form - it passes it back as only "land".

If I then write Land Registry into the form text box it works fine, but as this will be
eventually hidden and the user has already typed the search string on the original page - this is not an option.