'Now if I don't make the completest mistake'

From the autograph album of Mrs. S. C. Hall (after 1836).

Dickens, Charles

Autograph Album of Mrs. S. C. Hall.

Held at The New York Public Library's Archives & Manuscripts, http://archives.nypl.org/brg/19176#c218463. Quoted in Hall, S.C. and Mrs. S.C. Hall. ‘Memories of the Authors of the Age’. Art-Journal, vol.5, 1 January 1866, pp. 21-24; p. 22 and Hotten, John Camden. Charles Dickens, the Story of his Life (John Camden Hotten, 1870), pp. 280-281.

Dickens, Charles. 'Now if I don't make the completest mistake.' For Mrs. S.C. Hall (written after 1836): Dickens Search. Eds. Emily Bell and Lydia Craig. Accessed [date]. https://dickenssearch.com/verse/1836-after-Now_if_I_dont_make_the_completest_mistake.

Now, if I don't make
The completest mistake
That ever put man in a rage,
This bird of two weathers
Has moulted his feathers,
And left them in some other cage.