That 'the receptacle had been made and closed up by some practised hand' suggests that this was done with a great deal of care. Care not so much to hide it and so not draw attention that a less practised hand might make, something rougher. Rather this might be more consistent with the notion that this was done with a loving hand and gentle release, that the loss of the child was, as Mogg writes natural, and that this was to aid the transition in death. Roughly, not so carefully, making and closing the receptacle might suggest that it was done with urgency to get rid of further bad spirit and also rough might imply meeting negative with chaotic negative.
The white ball also seems to suggests an act of love and something for the child to have in the next world, white that it might ensure that it is whole and good, and therefore acceptable to those of the next world.
The number of eggs might suggest that they were doing everything in their power to ensure the transition, a sort of greater power, a potential power found in any egg or seed, in 60 rather than 1, ensuring that this child will be either reborn in the next world or for a return to this or possibly even both.
That the community was religious means that the local people were well aware of their religion because they were open in their religion. This also could mean that they were not hiding something which might suggest that their methods were more for creating positive, healing, and this might put this finding more in the light of something loving and a desire to do what they can to help the infant move to the next world with ease.