Under the command of Dr. Lonnie Smith, the Hammond B-3 organ can be subtly atmospheric or growlingly ecstatic.

A young forest growing up under your windows, and wild sumachs and blackberry vines breaking through into your cellar; sturdy pitch-pines rubbing and creaking against the shingles for want of room, their roots reaching quite under the house.

Hear the roll of cannon.

Next, TTBOMK you need to do your classes in header files if you are going to make them into generic templates...well, putting them into headers isn't strictly a requirement but the other restrictions for (templatizable code) would encourage only using headers.