After Standard Oil started on its way, Lamon moved to Kansas City, Missouri where he dabbled in the banking business.

After his father's death, Lamon decided to come back east and settle in Greenwich, Connecticut where he bought the William Avery Rockefeller mansion in 1891.

The farm's Big Barn built by Harkness in 1897 is 476 feet long, and has 52 stalls, a sales area and auctioneer's block – and it was still in service more than 100 years later at the Kentucky Horse Park.

Although sub-divided several times, a part of which is now home to the Kentucky Horse Park, Walnut Farm remains in the hands of his descendants.

In recognition of his contribution to the industry, in 1958 Lamon Harkness was inducted posthumously in the Harness Racing Hall of Fame.

With multiple residences including New York City as well as Kentucky, California and Connecticut, the question of where inheritance taxes should be paid came into play upon L.V.

[7] The case went to the State Supreme Court and The Harkness Estate was successful in defending the assertion that he was not a resident of New York upon his death.