Hello H2K
1. He stole off = he moved stealthily
2. a sluice = a hole through which the water can drain away
3. stole in / by the / masonry curb = stealthily entered / alongside / the stone edging
Would you be able to put a more specific title in your Subject box when you post, please, H2K?
It's difficult to know which of your "meaning" threads is which!
Thanks!
MrP