I cannot think that M. C. E.'s etymology of _London_ is a correct one; nor did I know that the British _Llan_ means a "level place generally." I take it that originally _Llan_ meant no more than "an inclosure," as we see in _winllan_, "a vineyard," "an inclosure for vines;" _perllan_, "an orchard" (literally a pear-yard). As churchyards were probably for some time almost the only inclosures in their districts, this will explain why the names of churches in Wales so commonly begin with _Llan_. Llanvair, Llanilltid, Llandilo, &c. were the _inclosures_, or yards, in which churches dedicated to St. Mary, St. Iltyd, St. Teilo, &c. were built, though in the course of time these names became applied to the churches themselves. The word _don_ is nothing more than _din_, or _dinas_, "a fortress," as we see in Lugdunum, Virodunum, Londinium, Dumbarton, Dunmore, &c. Old chroniclers say that the city of London was nearly, if not entirely, surrounded by water, which on the north, north-east, and south sides spread out into considerable lakes. Present names of localities in and about the City show traces of this. Finsbury and Moorfields take their names from the fens and moors, or meres, which were partially reclaimed from the lake which spread to the north and north-east, almost from the city wall. To the south the Thames extended far beyond its present boundary, forming an extensive lake. _Fen_church Street, _Turnmill_ Street, _Fleet_ Street, show that there were streams and fens to the east and west. Bearing in mind that British names were generally descriptive of the locality, may not the situation of old London furnish a clue to its etymology? Was not London then truly and descriptively _Llyn-dun_, or _Llin-dun_, the fortified place or fortress in or on the _lyn_ or lake? CUDYN GWYN. Replies to Minor Queries. _Legend of the Robin Redbreast_ (Vol. ii., p. 164.).--The following beautiful legend of the Robin Redbreast, which I have just met with, was quite new to me. If you think it likely to be so to T. Y. or any other of your readers, you will perhaps find a place for it. "_Eusebia._--Like that sweet superstition current in Brittany, which would explain the cause why the robin redbreast has always been a favourite and _protégé_ of man. While our Saviour was bearing HIS cross, one of these birds, they say, took one thorn from HIS crown, which dyed its breast; and ever since that time robin redbreasts have been the friends of man."--_Communications with the Unseen World_, p. 26. W. FRASER. _Monk and Cromwell_ (Vol. iv., p. 381.).--Will your correspondent state by what _intermarriage_ the estate granted to the Duke of Albemarle, vested in Oliver Cromwell, who died in 1821; and how, if he knows, it departed from Monk? If acquired by purchase from the successors of Monk, the interest ceases. G.