_Mount Mill, and the Fortifications of London._--In a topographical account
of Middlesex, published in the middle of the last century, I find the
following:
"_Mount Mill_, at the end of Goswell Street, was one of the forts
erected by the Parliament for the defence of London."
Will any of your correspondents be kind enough to inform me what the exact
site was; at what period it was demolished; what were the names and sites
of any _other_ forts erected by the Parliament at the time for the purposes
of defence; and, lastly, in what work any record of them may be found?