Lady Groan flung what remained of the grain across the room and the stone-chat hopping from the bed-rail to her head, took off again from that rabous landing ground with a flutter, circled twice around the room steering during his second circuit through the stalactites of shining wax, and landed on the floor beside the grain.
(M. Peake; Titus Groan)
What does it mean?
Thanks.

