1. New-York Saturday Press, "C. Cruyt & Co., Successors," March 24, 1866, 8. The Vault at Pfaff's. http://lehigh.edu/pfaffs. Ed. Edward Whitley and Rob Weidman. 

2. Elihu Vedder, From The Digressions of V.: written for his own fun and that of his friends. (New York: Houghton Mifflin Co, 1910), 226. 

3. William Pembroke Fetridge, The American Traveller's Guide. Harper's Hand-Book for travelers in Europe and the East, "ROUTE No. 14." Volume 4; Volume 8; Volumes 11-12. (New York: Harper & Brothers, Publishers, 1873), 303. 

4. Figaro, "Dramatic Feuilleton," New-York Saturday Press, March 24, 1866, 5. The Vault at Pfaff's. http://lehigh.edu/pfaffs. Ed. Edward Whitley and Rob Weidman. 

5. Figaro, "Dramatic Feuilleton," New-York Saturday Press, April 7, 1866, 4. The Vault at Pfaff's. http://lehigh.edu/pfaffs. Ed. Edward Whitley and Rob Weidman. 

6. Ibid. Clapp may also be referencing the advertising slogan "Go to Pfaff's" here. 

7. Figaro, "Dramatic Feuilleton," New-York Saturday Press, March 31, 1866, 4-5. The Vault at Pfaff's. http://lehigh.edu/pfaffs. Ed. Edward Whitley and Rob Weidman. 

8. Ibid. 

9. Courrier des Etats-Unis, "C. Pfaff, Restaurant, 653, Broadway," Notice, October 18, 1867. I was able to obtain a scan of the same notice, as it appeared at a later date, in the November 7, 1867, issue of the Courrier des Etas-Unis. 

10. Courrier des Etats-Unis, "C. Pfaff, Restaurant, 653, Broadway," Notice, November 7, 1867. 

11. The Fireside Companion, "The Secret of Success," [2]. 

12. Ibid. 

13. Ibid. 

14. Ibid.