2 Questions

On August 20, 2007 we were called to relocate a terrapin nest which contained eight eggs, still pinkish, tracks in sand, etc. and believed to be deposited that morning. One of our tagged terrapins used this area earlier in the season. We relocated the eggs to a covered container in the same beach sand which was maintained within a screened area in ambient Maryland temperatures. We monitored moisture conditions and added water only once, trying to simulate the drought conditions. To my surprise, on Sept 28, one hatchling began to emerge, 39-40 days. Over the next three days another three emerged. Four eggs remain and may not be viable, but the four hatchlings are doing great, small, but hardy. Two things: this was the latest nest I’ve ever observed in Maryland (prior date was July 19) and this was the shortest incubation period I’ve ever observed (shortest prior was 53 days.) What is the latest nest in Maryland or nearby? What is the shortest semi-natural incubation time for successful hatchlings? or incubation under controlled temps/moisture conditions. Any thoughts? Many thanks.