HCR diary 14.11.1827 "dined afterward at Aders -Dr Wurm and Dr Heusler were there"
25.12.1827 Christmas dinner at Aders "Heusler and Peiper were there - H: is so very shy and quiet I can make nothing of him, and only give him credit for learning and talents"
24.4.1828 "Scargil, Dr Heusler and Beldam breakfasted with me" "H: who is soon to leave the country. He is an excellent man, I believe, though dull and somewhat tiresome"
Marquardt II p115-6 "a young Swiss lawyer, whom I have scarcely seen". Also in HCR diary 14.12.1827, 23.2.1838, 11.3.1838 and soon after that he left England (Marquardt). Andreas Heusler (de.wikipedia 1802-1868). Studied law at Tubingen and Jena, doctorate 1826. Professor at Basel University 1828, later member of cantonal parliament and chief editor of Basler Zeitung, a conservative. His visit to England is not mentioned in the wikipedia article