before my nephew died everything was fine i used to be scared of who died before which was an old lady mysteriously. My nphew died in front of me when i was 11 it's a tough thing to take as a kid especially when your nephew is 18 months. Your teaching him what you learned. He died in my room where i am now third floor attic half attic half room type of deal. blocked off.
I offer my condolences to you.
It's never easy when someone you care for passes, especially when so young.
I concur with Bluejay...I don't feel that your cellar has anything to do with your nephew
but, I'm not so sure that talking or calling to a spirit is such a wise choice.
Chances are that you might call and something different could actually answer..not meaning to frighten you
with this thought so please, don't be.
The dogs reacting and the 'old woman whom died mysteriously' (if that is what you meant) caught my attention.
That 'could' be your answer (?).
If nothing is felt over that particular area, meaning room/area above the cellar and if nothing else
in or around the home feels peculiar...I wouldn't worry or feel fearful.
If it is her spirit, she can be shown the Light and perhaps be led away.
Just my 2 cents worth.