11From Benjamin Franklin to Cadwallader Colden, 30 July 1747 (Franklin Papers)
ALS : Yale University Library I receiv’d your Favour of the 26th. which I shall answer at large...
12From Benjamin Franklin to Cadwallader Colden, 6 August 1747 (Franklin Papers)
ALS : New-York Historical Society; draft: American Philosophical Society The Observations I sent...
13From Benjamin Franklin to Cadwallader Colden, 13 August 1747 (Franklin Papers)
ALS : New-York Historical Society I am glad the electrical Observations please you. I leave them...
14From Benjamin Franklin to Cadwallader Colden, 27 August 1747 (Franklin Papers)
ALS : Yale University Library This just serves to enclose you a Letter from our Friend Bertram;...
15From Benjamin Franklin to Cadwallader Colden, 24 September 1747 (Franklin Papers)
ALS : New-York Historical Society I have one of your Histories come in among some Books sent me...
16From Benjamin Franklin to Cadwallader Colden, 1 October 1747 (Franklin Papers)
ALS : New-York Historical Society I send you herewith the History of the Five Nations. You will...
17From Benjamin Franklin to Cadwallader Colden, 27 November 1747 (Franklin Papers)
ALS : New-York Historical Society The violent Party Spirit that appears in all the Votes &c. of...
18From Benjamin Franklin to Cadwallader Colden, 27 January 1748 (Franklin Papers)
AL : New-York Historical Society I received your Favour relating to the Cannon. We have...
19From Benjamin Franklin to Cadwallader Colden, 29 September 1748 (Franklin Papers)
ALS : New-York Historical Society I received your Favour of the 12th Inst. which gave me the...
20From Benjamin Franklin to Cadwallader Colden, 13 February 1750 (Franklin Papers)
ALS : Historical Society of Pennsylvania I receiv’d your very kind Letter relating to my...