It's the Gilbert & Sullivan comic opera where an old major general sings his "modern" song
It is sung by Major General Stanley 
at his first entrance, towards the end of ... Gilbert disliked Turner, who, unlike the 
progressive Wolseley, was of the old... [DOC] [TLE] The Pirates of Penzance - Wikipedia [PAR] The Pirates of Penzance; or, The Slave of Duty is a comic opera in two acts, with 
music by Arthur Sullivan ...