[[Note 664.1] The cover depicts people on a busy street. A man rides a steam-powered tea kettle, and several dogs approach a cart with robotic arms holding a whip that reads "Dogs Meat, cook'd by steam." A cat sits on a woman's shoulder. "J. Doe" flies with wings attached to his arms. Two men stand by hot air balloons; one says "I say Sam dont you want another feed of Coal afore you start?" and the other says "Now Six-going Up Sir." The nearest balloon is labeled "New Patent Balloon Coach, Starts every hour to Air Shire, No. 341 W. 169 Rex." The next balloon says "The Steam [Arm], The Cork Leg," and the following one reads "Cras[h]." A rising balloon is labeled "To Gretn[a] Green." Steam engines pass over a tunnel labeled "Antipodean Tunnel" to the "Half Moon Inn." An "Eagle" airship flies people to the "Sun Tavern: NB Hot Joints Always Ready." People on the left side of the street read posters: "All Alive, North Pole, Exhibiting Here," "Halleys Comet Bottled for Exportation," and "Ante-Steam Era Remains: Real Skeleton of a Horse, the Animal which is generally supposed to be a Fabulous Creation.

[Note 664.2] Halleys comet passed in 1835 It became visible from Britain in October [i]  its appearance was widely anticipated so the song may have been written before the comet was visible.

"Looking at Halley's Comet 1835 , by John James Chalon, 1835  [ii]

[i] Warder and Dublin Weekly Mail Saturday 03 October 1835  p3
[ii] National Maritime Museum http://collections.rmg.co.uk/collections/objects/268885.html

[Note 664.3] bar071~Meeting of Steam Arm & Cork Leg and bar414~Steam Pills are mentioned on the on the cover of Three Hundred Years. Both are derivatives of bar402~Steam Arm.

[Note 664.4] The court of chancery was infamous for delay.

https://en.wikipedia.org/wiki/Court_of_Chancery#Further_reform