The parts in and near London mostly inhabited by the Irish poor, are Calmel Buildings, Orchard Street; Petty France, Westminster; Paddy's Land, near Plaistow; forty houses on the Rumford Road; and in the parish of St Giles in the Fields. This latter place, which is their principal residence, is called their colony, and is styled by them "The Holy Land;" in the centre of it there is a mass of building called "Rats' Castle." In the time of Queen Elizabeth, St Giles's was the rendezvous of the beggars; for in "A Caveat, or Warning, for Common Cursitors, vulgarely called Vagabones, set forth by Thomas Harman, Esquire," 1567, it appears that Nicoles Genynges, the cranke, went over "the water into St George's fields," and not, according to the expectation of Mr Harman, who caused him to be dogged, toward Holborn, or St Giles's in the Fields. It appears from a very early plan of St Giles's in the Fields, in the possession of Mr Parton, vestry clerk of that parish, that the lowest class of its inhabitants live on a portion of sixteen acres formerly called "Pittaunce Croft" (the allowance), which extended from a large mansion called Tottenhall, the fragments of which were of late supposed to have been parts of a palace of King John; they have been recently taken down. This house of Tottenhall was formerly inhabited by a Prebendary of St Paul's; it stood on the north side of that part of the road called "Tottenham Court," leading from the north end of Tottenham Court Road to Battle Bridge. The sixteen acres commenced from the above house, and went on southerly to St Giles's Church, and from thence easterly along the north side of the High Street to Red Lion Fields (now Red Lion Square). The streets, lanes, alleys, and courts, forming the nest of houses inhabited by thieves, beggars, and the poor labouring Irish, are encompassed by a portion of the south side of Russell Street, formerly called Leonard Street, commencing from Tottenham Court Road, parts of the west sides of Charlotte and Plumtree Streets, and a part of the north and round the east of High Street to the first mentioned station of Russell Street. To the honour of Scotland, not one Scotch beggar is to be found in the dregs or lees of St Giles's. However wretched and depraved the inhabitants of this spot may now be, they certainly were worse fifty years ago, for it appears that there was then no honour among thieves; the sheets belonging to the lodging-houses, where a bed at that time was procured for twopence, having the names of the owners painted on them in large characters of red lead, in order to prevent their being bought if stolen,--as for instance, JOHN LEA, LAWRENCE LANE. STOP THIEF.