the elder Colas; the Mutuelle letter of 1 Sept 1855 is by a Colas, de-masked as F. Collas, Uriel #168 (27, professor of languages, res. Saone-et-Loire — src/sources/colas); which of the two Colas wrote it is not certain, the berth is placed here
Ship
Uriel, Antwerp → New York, sworn about 21 February 1855, master James G. Foster — #168, as Collas, 27, professor of languages