Aha!
The horizontal scroll bar was not available at first. It has just popped into view and I was able to scroll to the right, and hey, presto, there is the link in all its glory. I do not know why this was the case, but the scroll bar just was not there at all...please feel free to remove all the redundant rubbish which I have posted here ... cheers!

I think I should leave it. Others may have the same problem. (The only reason I thought of it was because I had a similar problem in making new forums. I couldn't find the "Submit" button for a few weeks. @Self)