Spanish Civil War Memorial

This memorial sits in the corner of Princes Street Gardens (East). I've probably walked past it many times without paying much attention.
The plaque reads-
TO HONOUR THE MEMORY OF THOSE WHO WENT FROM THE LOTHIANS AND FIFE TO SERVE IN THE WAR IN SPAIN 1936 - 1939

NOT A FANFARE OF TRUMPETS
NOR EVEN THE SKIRL O' THE PIPES
NOT FOR THE OFF'R OF A SHILLING
NOR TO SEE THEIR NAMES UP IN LIGHT
THEIR CALL WAS A CRY OF ANGUISH
FROM THE HEARTS OF THE PEOPLE OF SPAIN
SOME PAID WITH THEIR LIVES IT IS TRUE
THEIR SACRIFICE WAS NOT IN VAIN

A lovely verse to remember those lost.