When he died on October 17, 1962, at age sixty-nine, Jack Lamberton left the Winona County bench and bar with a docket full of memories and stories of his skill as a trial lawyer. In a memorial service by the county bar association in district court in January 1963, he was recalled:
"The court calendars for terms of District Court in Winona County during the 1920's and 1930's show that Mr. Lamberton appeared in as many as fifty cases in one year and he was always at home when he was presenting his case to a jury. . . . The constitutional right of the defendant to competent counsel in a criminal case was always a cardinal principle with Mr. Lamberton, and, to his great credit, in a field so often shunned by many lawyers, no defendant was too indigent, and no cause too unpopular, for him to refuse his services, and in this he set an example for the entire local bar. . . .
"He believed in the rights of every man and no case was so publicly unpopular or a man so poor as to prevent Jack's protecting those rights.
"Jack was a sensitive man sociable and kind, gracious in victory, gracious in defeat.
"The memory of Henry M. Lamberton, Jr. as a brilliant, effective trial lawyer of strong convictions, and the courage to support them will and should, I believe, remain for generations."