It was sitting neatly in the nesting box. I found it when I checked on them this morning. It was still warm. I can't help thinking that it is a timely thankyou for all of my hard work over the weekend to improve their living quarters. Probably just perfectly timed (the seller did say in about 3 weeks), but for today, I'm taking it as a welcome thankyou.
Anyone who has enjoyed homegrown fresh, free-range eggs and then had to go back to store bought will understand my joy. At last the egg-drought has been broken!