The northern suburbs were staggered. In Fortis Green, North End, Highgate, Crouch End, Hampstead, Stamford Hill, and Leyton the quiet suburban houses were threatened, and many people, in fear of their lives, had now fled southward into central London. Thus the huge population of greater London was practically huddled together in the comparatively small area from Kensington to Fleet Street, and from Oxford Street to the Thames Embankment. People of Fulham, Putney, Walham Green, Hammersmith, and Kew had, for the most part, fled away to the open country across Hounslow Heath to Bedfont and Staines; while Tooting, Balham, Dulwich, Streatham, Norwood, and Catford had retreated farther south into Surrey and Kent. For the past three days thousands of willing helpers had followed the example of Sheffield and Birmingham, and constructed enormous barricades, obstructing at various points the chief roads leading from the north and east into London. Detachments of Engineers had blown up several of the bridges carrying the main roads out eastwards--for instance, the bridge at the end of Commercial Road, East, crossing the Limehouse Canal, while the six other smaller bridges spanning the canal between that point and the Bow Road were also destroyed. The bridge at the end of Bow Road itself was shattered, and those over the Hackney Cut at Marshall Hill and Hackney Wick were also rendered impassable. Most of the bridges across the Regent's Canal were also destroyed, notably those in Mare Street, Hackney, the Kingsland Road, and New North Road, while a similar demolition took place in Edgware Road and the Harrow Road. Londoners were frantic, now that the enemy were really upon them. The accounts of the battles in the newspapers had, of course, been merely fragmentary, and they had not yet realised what war actually meant. They knew that all business was at a standstill, that the City was in an uproar, that there was no work, and that food was at famine prices. But not until German cavalry were actually seen scouring the northern suburbs did it become impressed upon them that they were really helpless and defenceless. London was to be besieged!