So sorry you lost the one. I use to help them but chicks that don't hatch there is usually something wrong with them and you definitely don't want to breed that forward. Unless it is from shrink wrapping or something I did to cause them to not be able to hatch.
I helped a chick to hatch. she was the only chick that hatched with very low temperature (34 celsius instead of 37,5), on day 23 and the egg was 19 days old. she is a very healthy hen, around 3 years old.