Jim Elbrecht wrote:

-snip-

There is a 130 year old dry-laid stone wall that I admire when I walk
the dog. If my wall lasts 1/2 of that it won't be my problem
anymore.

Oops- I correct myself. The wall is 158 years old, and was mortared
with hydraulic cement. Photos here-
http://www.hmdb.org/Marker.asp?Marker=25101

Jim