His son, Henry Clews Jr., lived at Château de la Napoule, France.

[2] At age 14, while in training for the Anglican Church, Clews traveled to New York City, where he "began to perceive the possibilities that presented themselves to a young man.

[6] In an 1886 article in The New York Times, his firm was referred to thusly: They have called together a staff of assistants who for ability and character are unsurpassed, and from the senior member down to the lowest clerk they are one and all actuated by the same idea, and are untiring in their efforts to further the interest of the patrons and also that of the firm itself.

The value of this co-operation on the part of employes will be readily understood when it is taken into consideration that the present business of this firm aggregates thousands of millions of dollars annually, including a general banking business and the execution of orders on the New-York Stock Exchange, New-York Produce Exchange, New-York Petroleum Exchange, and the Chicago Board of Trade, with all of which concerns this house is connected by membership, but which also necessitates the employment of a large number of brokers to aid them in their large commission business.

[6]In politics, Clews was a Republican and organized the "Committee of 70", which deposed the corrupt ring associated with William M. Tweed in New York City.