Plaque

Per Aspera Tenax {Latin for 'Steadfast through adversity'}
{Either side of the relief bust:} 1768 - 1843
To the memory of the Reverend Alexander John Forsyth, MA, LLD, Minister of Belhelvie, Aberdeenshire. In 1805 he conducted experiments in the Tower under the Master General of Ordnance and in 1807 invented the percussion system which was adopted by the British Army in 1839.

This tablet erected in 1929 by admirers of his genius.

{At bottom left is a relief labelled:}
Carbine lock
{At bottom right a relief labelled:}
3pdr. lock