In Cook v. Patterson Drug Co., 185 Va. 516, 39 S.E.2d 304 (1946), the Supreme Court of Virginia approved the rule that when "words have a doubtful, ambiguous, or hidden meaning . . . not only may the person who used the words testify as to his meaning, but all persons who heard the words spoken may testify as to what they understood the speaker meant by their use." Id. at 521-22, 39 S.E.2d at 307.