With Alexander Fergusson of the National Bank, he was a co-trustee of the Marks Benevolent Fund (these days called the Hyman Marks Trust[REF]), which supplied the main portion of the cost incurred in the erection of the Marks Ward at the Christchurch Hospital, amounting to £10,000 [REF].
As a Freemason, Louisson held office for many years as District Grand Master for Canterbury under the Scottish Constitution [REF].