Thanks that is a great tip and I can and will use it.
I have not tired this on some of my other pictures where I would like to keep a seam, like the corner in this picture, but I am going to guess I can select the seam/corner and do the same with it....applying Edit > Transform > Distort. Again thanks for the tip. As I was stuck on using the stamp clone tool, but as you pointed out there is another way :-)
Happy to help, Warren. As is often the case with Photoshop, and appropriate in this case, there is anther way to accomplish the task.
Select a part of the image that includes both a reference area and one you want to replicate. (Step 1)
In the case of your image, place it on another layer so that later steps do not reference undesirable tones.Then select the area you want to change. (Step 2)
Lock the blank area and Edit > Fill > Content Aware (Step 3)
Flatten (Step 4)
Yes, I realize that there are other options when it comes to using Photoshop, that is the reason why I asked. I was stuck on using the Stamp clone tool. But with the help of this group I am learning the other ways :-)