Message on plywood board, replacing window in derelict building, for whom? From whom?
The Morse code like the call of ring doves, which are plentiful round here, can, when abbreviated, be mistaken for the call of a cuckoo, although you don't see or hear cuckoos in these parts nowadays.
People say almost out of habit, "summer at last," as though summer were late, when in fact the hot weather seems to be a little early. "Summer at last", is the sort of thing people say when they are little disappointed that there is no longer bad weather to grumble about.