With entry of the ships, the glistening pier-head becomes thronged by tidesmen and their gear; like a drill-yard, with the lusty stamp of the marching lines of dockmen trailing heavy hawsers and handing check and hauling ropes. In an hour or so the gangs of the ship-repair section will be ready to 'turn to' at the new jobs, and the ships must be settled and ready against the wail of the starting 'buzzer.' Shrill whistle signals, orders and hails add to the stir of the labourers, and clatter of the warping capstan joins in with ready chorus. Not least of the medley is the bull roar of the harassed dockmaster, who finds a need in the press for more than one pair of hands at the reins to guide and halt his tandem charges. The ships are marked in company, to settle bow to stern, with no room to spare, in the length of the dock. Conduct must be ruled in duplicate to exact the full measure of utility from every foot of space. On the last tide a pair of sound ships were floated out to service, braced and bound and refitted for further duty as stout obverse to the 'Sure Shield.' Keel-blocks and beds for the new patients have been set up and rearranged in the brief interval of occupancy, and now, quick on the wash of the outgoers, are new cases for the shearing plate-cutters and the swing of hammers. Mindful to conserve their precious dry-dock space to the limit of good service, the repair section select the vessels with rare judgment. It is no haphazard turn of the wheel that brings an American freighter, shattered in stern section, to the same operating-table as an east-coast tramp (having her engines in scrap, boilers fractured, and the frames of her midships blown to sea-bottom). The combined measure of their length and the similarity of extent in hull damage has brought them to the one line of blocks. Odd cases, and regular ship-cleaning and minor repairs may be allotted to single-ship dry docks, but here, in sea-hospital with a twin-berth, there is a need for parallel treatment. The two ships must be considered as one, and all efforts be promoted towards refloating them, when hull repairs are completed, on one opening of the sea-gate. In this, strangely, they are assisted by the enemy. True, his accommodation could well be spared, but it does have an influence on repair procedure. The exact and uniformly graded proportions of the enemy explosive reproduces a correspondingly like extent and nature in ship damage. Location and sea-trim may vary the fractures in proportion to resistance but, with the vessels on the blocks together, working time may be adjusted to these conditions and a balance be struck that will further a simultaneous completion. So the dockmaster ranges his pair on the centre line of the keel-blocks, sets tight the hawsers that hold them in position, and bars the sea-entry with a massive caisson. Presently he passes an order to the pumpman, and the power-house echoes to the easy thrust of his giant engine.