1To Benjamin Franklin from Emanuel Mendes da Costa, 20 July 1765 (Franklin Papers)
ALS : Historical Society of Pennsylvania The Committee for Mr. Canton’s Experiments meet Again on Tuesday next 23 Instt at 11 O’Clock precisely to prosecute the same. I am Sir Your humble Servant Emanuel Mendes da Costa (1717–1791), son of a London merchant, was trained as a notary, became a student of conchology, mineralogy, and fossils, and during his checkered career published several books...
2To Benjamin Franklin from Emanuel Mendes da Costa, 25 August 1765 (Franklin Papers)
ALS : Historical Society of Pennsylvania The Committee for examining Mr. Canton’s Experiments On the Compressibility of Water are Appointed to meet at the Society’s house on Thursday next 29 Inst. at 11 O’Clock. I am Sir Your h[umble] Servant On da Costa and the occasion for this notification, see above, p. 220.
3To Benjamin Franklin from Emanuel Mendes da Costa, 2 February 1767 (Franklin Papers)
Printed form with MS insertions in blanks: American Philosophical Society The Committee (to whom the Consideration of the Papers communicated to the Society at their Weekly Meetings is referred, by Virtue of a Statute of the said Society , passed at a Council, held on the 26th Day of March, 1752) having been appointed to meet at the Society’s House in Crane-Court, Fleetstreet, on Thursday the...