Nest found in fallen tree

Found what we think is a blackbird nest with 4 eggs in when clearing some fallen trees, no idea how long it had been there, with gloves we placed it back in a hedge but it’s been a week and no sign of any birds going to nest even though there are many in the bush, mainly sparrows, some blackbirds spotted nearby. What’s best to do with the eggs/ nest now? We are assuming they are no longer viable as they’ve not been attended to.