HCR diary 11.5.1822 at Aders where Kiesewtter performed "A Mlle Leclerc was also there - a fine girl who sang Italian airs with great spirit and effect - she is young & interesting and I have no doubt will excite a strong sensation when she appears - her performance was to me rather admirable than pleasing"
I could find no references to Mlle Leclerc in newspapers, musical dictionaries, or English deaths or marriages