The history of its (non-existent) bishopric was then traced down to the supposed last incumbent in the late eleventh century.
Unfortunately this is possible only in a very few places: generally when an eleventh-century source survives, nothing later does.
There is an eleventh-century announcement of the movable feasts quite unlike those we have heard before.
There are almost no technological grounds to withhold wax tablets from the hands of composers of polyphony anytime from the eleventh to the fifteenth century.
There were serious efforts in the late eleventh century to cleanse the hymn repertory of certain excesses.
They will not get full-time work out of them when the consultants are on two-elevenths and not in the same hospital but a very long way away.
In the case of the 4,000,000 spinsters who contribute to the national pensions fund, seven-elevenths, of their weekly pension contribution goes to swell the widows' and orphans' fund.
What about the use of the nine-elevenths of their time?