“The	Study	in	Pink”,	when	Sherlock	uses	a	woman's	umbrella	in	combination with	her	coat	to	determine	where	she	came	from. 	In	that	case,	the	umbrella	was dry	and	unused,	but	the	coat	was	soaked. 	That	must	mean	that	it	was	highly windy,	much	too	strong	for	the	use	of	an	umbrella.