Amendment gaps

Gerard's post about near amendments and search for sources reminded me of my similar request to a listserv a few months ago. I had been thinking about the 61-year gap between the 12th (1804) and 13th (1864) Amendments, the longest period between amendments in history. More recently, I was thinking that we are closing in on that record, at 53 years and counting since the 26th Amendment and no amendment likely to be ratified any time soon. But I forgot about the 27th Amendment, ratified in 1992, although proposed in 1789. Resetting the clock, we are at 32 years--about half the record and a decade short of the 43-year gap (to the day--February 3) between the 15th and 16th.