Is this use of 'chuse' a spelling mistake, a digitization error or the correct spelling for the time?

I am currently reading Emma, by Jane Austen. The version I am reading is the digitized ebook version and in chapter 12 the word choose is spelled chuse:

"My dear Isabella," exclaimed he, hastily, "pray do not concern yourself about my looks. Be satisfied with doctoring and coddling yourself and the children, and let me look as I chuse."

Since I don't have the physical book, I am unable to determine if this spelling is an error introduced during the digitization process, which is sometimes the case. If it is part of the original, is this spelling correct for the time period or is it a spelling mistake?

'Chuse' was actually a variant spelling which went out-of-style around 1840, after enjoying singnificant popularity in the 1700s.

Since your novel was published in 1815, I'd say it's not an error.

Link for some example usages from Google Books.

"Chuse" was a common alternative spelling. Today, it's obsolete, but many authors from the 19th century and earlier (ch)use it. For example,

I would the Colledge of the Cardinalls Would chuse him Pope. – William Shakespeare, Henry VI, Pt. 2 i. iii. 65 (1616/1623)

Chuse an Author as you chuse a Friend. – Wentworth Dillon, 4th Earl of Roscommon, An Essay on Translated Verse (1684)

At Liberty to chuse their Business. – Samuel Johnson, The Idler (2nd February, 1760)

Sing another song, or chuse another tree. – William Wordsworth, Lyrical Ballads II.77 (1800)

Would not Mr. Waverley chuse some refreshment after his journey? – Sir Walter Scott, Waverley I. ix. 121 (1814)