Harold Harris practiced law in St. Paul for forty-four years. He was a sole practitioner, who specialized in real estate and probate matters. He died on August 24, 1933, at age seventy-five. In memorial proceedings the following year, a committee of the Ramsey County Bar Association recalled:
"Throughout his professional care career he exemplified all those principles of conduct which are constantly held up to the members of our profession as typifying the highest ideals of the Bar. Early in his practice, he set high personal and professional standards for himself and maintained them throughout his life. The qualities which he exhibited in his relations to the courts and to his fellow members of the Bar won for him their confidence and esteem.
"He had a strong sense of personal and professional integrity, a quality which could never be too common in our profession. He prepared his cases with painstaking care and always displayed a marked fidelity to his clients, many of whom retained him as their counselor over long periods of time."
The Memorial Committee also noted that "conservation" ranked high among his "varied interests":
"He placed a high value on the privileges of outdoor recreation and devoted himself unsparingly to the conservation and protection of wild life. He rendered conspicuous service along this line as a Director of the Minnesota Game Protective League. Indeed, his service to this league for sportsmen is written in its record from the beginning. He had known intimately from his boyhood that which he sought to preserve. His advice upon proposed legislation relating to conservation was invaluable. He helped to organize the Ramsey County Sportsmen's Association, and his active interest in the affairs of that organization was a source of much real inspiration. At the time of his death, he was President of the Minnesota River Gun Club, an office he held with that group of sportsmen for twenty years."