Double Duty

https://archive.org/details/StrandVolume22/page/n789/mode/2up?view=theater

From the Strand, December 1901, “one of Sir John Stainer’s musical jokes, two hymns in one — in B flat or G major, according to the manner in which it is read, upside up or upside down. It was written as an autograph for a friend of his son’s.”