Napoleon's Brest concentration meets British fleet depth

Napoleon later argued that Villeneuve could have joined Ganteaume at Brest and enabled the invasion of England. That claim has to be tested against the Royal Navy's dispersed but substantial force structure. Cornwallis could have combined with Nelson, Collingwood, Calder, Strachan, and perhaps ships released from Keith's watch on the Dutch coast. That response might have produced roughly fifty to sixty British ships of the line, with the cautious Calder serving effectively under stronger operational direction. A successful French junction would therefore have triggered a British concentration of its own and continued the naval contest. When Villeneuve learned Rosily was coming to replace him, he finally sailed on 20 October and produced the historical battle instead of the junction Napoleon later imagined.