Hi Stuart!
Perhaps it is possible that this expression comes from the First World War, which was still recent at that time and many American soldiers participated in it. The walls of the trenches in eastern France were then consolidated with clay, denser than loose earth.
Perhaps it is possible that this expression comes from the First World War, which was still recent at that time and many American soldiers participated in it. The walls of the trenches in eastern France were then consolidated with clay, denser than loose earth.