39 Devonshire Place, London was in 1836 the main home of John Kenyon, who was responsible for introducing Elizabeth Barrett (his cousin) both to Robert Browning and to William Wordsworth. On 28 May 1836, Elizabeth Barrett Browning met William Wordsworth at a dinner party hosted by John Kenyon, likely at this location. Later, EBB wrote the sonnet, "On a Portrait of Wordsworth, by R. B. Haydon." Some of the cultural figures who attended events at Kenyon's home included Charles Babbage, Charles Dickens, Benjamin Haydon, Charles Macready, Sir Anthony Panizzi, Bryan Procter, and Henry Crabb Robinson. Image: Portrait of John Kenyon by lithographer Richard James Lane, after John Collingham Moore; This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 100...

St. Helena, an island in the South Atlantic Ocean, is where Napoleon Bonaparte was imprisoned in exile after his defeat at the Battle of Waterloo in 1815, which ended the Napoleonic Wars of 1803-1815.  Napoleon died on the island six years later at the age of 51.  Image:  Benjamin Robert Haydon, Napoleon Musing at St Helena.  This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 100 years or less.

Waterloo is where Napoleon Bonaparte was defeated for the last time on 18 June 1815. The defeat marked the end of the Napoleonic Wars (1803-1815).

Rydal Mount, Grasmere is on the eastern shore of Rydal lake, only 8 or 9 miles from Helvellyn. It is where Wordsworth was living when Elizabeth Barrett Browning wrote "On a Portrait of Wordsworth."