Thank so much for the reply.... I bought the eggs from a reputable breeder a full day's drive from me (so not too far off) and he did a great job of wrapping each one in a bubble wrap pocket with an open end..... I bought 36 and he sent 42. Even the box was in really good shape. He subdivided it inside for extra security (I have to remember this stuff in case I ship later on!)...
My attempt at candling was a learning experience. Some I could clearly see a small air pocket, some I could see the yolk, a couple had a rolling pocket or saddle shape, and others I couldn't see anything at all (no air pocket visible).
Congrats on your wonderful Silkie hatch
and much luck to you on your guineas
(fun birds!)