And apparently if you smell flowers the spirit is female and the smell of cigar smoke its a male ghost.
A friend has a sort of 6th sense for it she can't see speak to or contact ghosts she can sense there presence, and an old pub we owned she refused to enter the ladies toilets in the restrurant as she said there was a spirit in there, also if you open the same door the dog would growl and bark at nothing. Although we never heard or saw anything.