"Under the Rose"

I find the three following derivations for this phrase in my note-book:— I. "The expression, 'under the rose,' took its origin," says Jenoway, "from the wars between the Houses of York and Lancaster. The parties respectively swore by the red or the white rose, and these opposite emblems were displayed as the *signs of two taverns*; one of which was by the side of, and the other opposite to, the Parliament House in Old Palace Yard, Westminster. Here the retainers and servants of the noblemen attached to the Duke of York and Henry VI. used to meet. Here also, as disturbances were frequent, measu…