We need to update the letter, since we tracked down the book! See the back list in the Journal.
<bibl xml:id="Tentamen">
<title level="m">Tentamen : or,
An essay towards the history of Whittington,
some time Lord Mayor of London.</title>
<author>Theodore Edward Hook</author>
<publisher>William Wright, 46, Fleet Street London</publisher>
<date>1820</date>
</bibl>
We have some new information on the book Tentamen that Mitford references in her journal on 10 November 1820, and also in one of our letters on the website from 11 November 1820: https://digitalmitford.org//getLetterText.php?uri=1820-11-11-SirWilliamElford.xml
We need to update the letter, since we tracked down the book! See the back list in the Journal.