Harry keeps file cards of Lucy's excuses for her lateness and absence. One excuse is that it is Paul Revere's birthday. Paul Revere's birthday is January 1st so it would be a holiday anyway.
There is a small blue vase on Lucy's desk with nothing in it that has never been there before. Probably Lucy was supposed to put the plucked orchid in it, but there was not enough stem for it to stay put, so Lucy just lies it on her desk.
Lucy brings Harry the Mosier file, but she retrieves it from the file drawer marked A-D.