Later, in a letter of December of that same year, Horace Walpole mentions Count St. Germain as being arrested in London on suspicion of espionage (this was during the Jacobite rebellion of 1745), but released without charge:
The other day they seized an odd man, who goes by the name of Count St. Germain. He has been here these two years, and will not tell who he is, or whence, but professes [two wonderful things, the first] that he does not go by his right name; and the second that he never had any dealings with any woman – nay, nor with any succedaneum [substitute, i.e. for a woman]. He sings, plays on the violin wonderfully, composes, is mad, and not very sensible. He is called an Italian, a Spaniard, a Pole; somebody that married a great fortune in Mexico, and ran away with her jewels to Constantinople; a priest, a fiddler, a vast nobleman. The Prince of Wales has had an unsatiated curiosity about him, but in vain. However, nothing has been made out against him; he is released; and, what convinces me that he is not a gentleman, stays here, and talks of his being taken up for a spy.[11]