Limehouse to North Woolwich .—If a stranger be willing to lay aside the ideas of mere pleasure  spots, he will find much to look at and think about in the stretch of river margin here denoted.  First comes the Isle of Dogs , joining Limehouse on the east.  This strange horseshoe-shaped piece of ground is almost wholly below the level of the river, the inroads of which are only prevented by embankments.  The northern neck of the peninsula (for it is not strictly an island) is occupied by the West India Docks; the middle portion is not much appropriated to any useful purpose, on account of the lowness of the site; the river edge is fringed with shipbuilding and factory establishments.  The Great Eastern  was here built at Messrs. Scott Russell's works.  A new church has been built at Cubitt Town , the name now given to the eastern part of the Isle.  Next below the Isle of Dogs are Poplar  and Blackwall , now forming one town—observable for the shipyard of Messrs. Green, the terminus of the Blackwall Railway, the East India Docks, and two or three river-side taverns where whitebait dinners  are much in fashion during the season.  Then comes the spot, Bow Creek, at which the River Lea enters the Thames, so closely hemmed in by shipyards and engine-factories, that the Lea itself can barely be seen.  The great shipyard of the Thames Company, late Messrs. Mare's, is situated here.  Next we come to the extensive and convenient Victoria Docks , occupying ground which was previously mere waste.  Beyond the Docks are new centres of population gradually springing up, called Silvertown  and North Woolwich , with large factories and a railway station.  Still farther east, near Barking Creek , there may be seen the vast outfall of the great system of drainage for the northern half of the metropolis.