But both authors tell the story of Gregory Watson, a University of Texas undergraduate who wrote a paper on one of the amendments proposed at the time of the Bill of Rights but not adopted. It would have made Congressional pay raises effective only after the next election. Watson started a letter-writing campaign, noting that in this case there was no deadline for ratification. The upshot was the most recent amendment, the 27th, ratified in 1992.
Characteristically, it is Lipsky who includes the killer detail. Watson’s professor, unconvinced that the amendment was still pending, gave him a C.
From an Adam Liptak review of Annotated Versions of the Constitution from Seth Lipsky and Jack N. Rakove
Of course, there’s also the incredibly useful Cornell version of an Annotated Constitution: http://www.law.cornell.edu/anncon/