"Danny D." writes:

On Mon, 08 Apr 2013 22:05:29 -0400 Dan Espen wrote:

Hmm, some of those bricks never had mortar.

Ooops. I just looked again at the pictures, and I see what you mean.
You're right. Some of those bricks aren't the original bricks.
Maybe the previous owner put them there to make the wall look better?

That's what I'm thinking.
The OP should remove all the loose bricks and post another picture.

--
Dan Espen