This "blues" is based on an unusual 8-note scale containing these notes: E-F-G-A#-B-C-C#-D-E, so although it has a 12-bar structure, the chords are a bit strange.
"Anansi, the spider, is one of the most popular animal tricksters from West African mythology. Tricksters are mischievous figures who often oppose the will of the gods, resulting in some kind of misfortune for humans." ~Info from: http://www.mythencyclopedia.com
"Entrance of the Gladiators" op. 68 is a military march composed in 1897 by the Czech composer Julius Fučík. He originally titled it "Grande Marche Chromatique," reflecting the use of chromatic scales throughout the piece, but changed the title based on his personal interest in the Roman Empire. In 1901, American publisher Carl Fischer published a version of this march, arranged for American wind bands by Canadian composer Louis-Philippe Laurendeau, under the title "Thunder and Blazes." It was during this period that the song gained lasting popularity as a screamer march for circuses, often used to introduce clowns. Today it is known mainly by this association, even though the title and composer are relatively obscure. ~from Wikipedia