Letter from Henry James to Grace Norton on Feb. 18, 1870. MS Am 1094 (879).

The passage reads, in part:

"mother that they are frequently of her. Give my most
thankful love to Jane & assure her that
I don't mean to rest till I have recovered
her letter. Bien des choses to Charles
& Sara. Address me (when inclined)
Dr. Rayner's, as above. Proclaim my
greetings to all Italy & believe me
dear Grace—unutterably yours. H. James jr"

Transcription from The Complete Letters of Henry James, 1855 – 1872, Vol. 2.