Kathleen Mavourneen was a song popular during the American Civil War. It was written by Frederick Crouch and Marion Crawford in 1837.
The Battle of Fontenoy was part of the War of the Austrian Succession, a war which took place from 1740-1748. The battle was fought on 11th May 1745 in Fontenoy, which is now part of Belgium. It resulted in a victory for the French over the Allied forces of Great Britain, Austria, Hanover and the Dutch Republic.
The book goes on to quote the lines "The best laid schemes o' mice an' men gang aft agley". These lines are from the poem To a Mouse by Robert Burns, written in 1785, and have passed into common useage as a proverb. They also inspired the title of John Steinbeck's book Of Mice and Men.
The Minstrel Boy is an Irish song written by Thomas Moore. If you have Spotify, click on the song title to hear a version of the song by Joe Strummer which appeared during the credits of the film Black Hawk Down.
The lyrics of the hymn All Things Bright and Beautiful were written by Cecil F. Alexander in 1848 and are usually sung to the tune of either Royal Oak (a 17th century melody adapted by Martin Shaw) or Bright and Beautiful by William Henry Monk.