Meaning: The quote you've provided is a satirical statement made by Joshua Norton, who declared himself "Emperor of the United States and Protector of Mexico" in the mid-19th century. Norton was a well-known and eccentric figure in San Francisco during that time, and he often issued proclamations and decrees that were meant to be humorous and entertaining rather than serious.

In this particular quote, Norton is humorously ordering the Supreme Court of the United States to try Andrew Johnson, who was the 17th President of the United States, for usurping the imperial authority and prerogatives that Norton claimed for himself as "Emperor." Norton's proclamation suggests a mock trial for Johnson, with the outlandish punishment of beheading him or sending him to black the Emperor's boots if found guilty.

Joshua Norton's self-declared imperial status and his whimsical proclamations were not to be taken seriously, but rather as a form of performance art or entertainment. Despite the absurdity of his claims, Norton was well-liked by the people of San Francisco and often seen as a harmless and endearing character.

The quote reflects the playful and eccentric nature of Norton's "reign" as Emperor and his tendency to engage in theatrical and humorous acts. It also serves as a commentary on the political climate of the time, as well as a reflection of Norton's own beliefs and values.

Andrew Johnson, the subject of the quote, was a controversial figure in American history. He became President after the assassination of Abraham Lincoln and faced significant challenges during his presidency, particularly in the aftermath of the Civil War and the process of Reconstruction. Johnson's political decisions and policies were a source of considerable debate and criticism, leading to his impeachment by the House of Representatives in 1868. The Senate trial that followed ultimately resulted in Johnson's acquittal by a single vote.

Norton's proclamation can be seen as a satirical commentary on the political turmoil of the era, as well as a reflection of public sentiment towards figures of authority. By humorously calling for Johnson's trial and proposing absurd punishments, Norton may have been expressing a sense of disillusionment or frustration with the political establishment.

It's important to note that Norton's declarations and actions were not meant to be taken as genuine threats or calls to action. Instead, they were part of his eccentric persona and his desire to entertain and engage with the public. His "reign" as Emperor of the United States was a form of performance art that captured the imagination of many people in San Francisco and beyond.

In conclusion, the quote attributed to Joshua Norton reflects his playful and satirical approach to self-proclaimed imperial authority, as well as his lighthearted commentary on the political figures of his time. While the quote may seem outrageous and nonsensical, it is in keeping with Norton's eccentric and entertaining persona and serves as a fascinating glimpse into the colorful history of 19th-century San Francisco.