[1] One of their works, St Helen's Villa, on Taybridge Drive in Aberfeldy, was part of a townscape analysis by Perth and Kinross Council in 2008.

[4] In 1898, Pitlochry Public Hall, as it was originally known, was the subject of a design competition won by Dundee architect Alexander Ness, ahead of another Pitlochry architect, John Menzies.

[9][10] In 1902, Leonard was involved in a lawsuit, on behalf of the pursuer Thomas Russell, against "Mrs Jane Blair or Menzies and others, trustees and executors of the late Adam Menzies, plumber, Pitlochry", for the non-fulfilment of a contract for plumbing work.

The following March, the Perth sheriff found in favour of the defence, and stated that they were "entitled to expenses on the higher scale".

He is interred in the kirkyard of Pitlochry's Holy Trinity Church, which he partly designed.