The calendar was different in England in the 1700 so the 11th month would be what month? I know the 9th month is November.
The UK calendar was reformed in 1752. Before that, the year began on 25 March and the Julian calendar was used. In September 1752, 11 days were deleted to align with the Gregorian calendar used in most of Europe, and the year began on 1 January- i.e. 31 Dec 1752 was followed by 1 Jan 1753.
If March was the 1st month, then the 11th month must be January.
Here's a link to a Quaker notice sent out to Quaker meetings explaining the calendar change.
It includes a chart indicating how 1st month was March but after 1752 1st month will be January.
Note, though, that labels like 7bris, VIIIber, 9ber, and 10b~ are always September, October, November, and December, independent of the date of the new year. They're not numbered months, but abbreviations based on the names of the months and the Latin number-words (septem = seven, octo = eight, novem = nine, decem = ten). (Yes, the Romans originally started the new year in March, too. Sometimes. For some things.)