Not a trace of someone or something missing

I turned all the drawers inside out looking for my ring, but I could find neither hide nor hair of it. I'm afraid it's lost for ever

Ho buttato all'aria tutti i cassetti, ma del mio anello neanche l'ombra. Ho paura di averlo perso per sempre

They say the package I was waiting for has been delivered to my address two days ago, but I definitely saw no trace of it

Dicono che il pacco che stavo aspettando mi è stato consegnato due giorni fa, ma io del pacco non ho visto neanche l'ombra

The whole neighborhood has been looking for Charlie's missing doggy, but they couldn't find neither hide nor hair of it

Carletto ha perso il suo cagnolino e tutto il quartiere si è messo a cercarlo, ma del cucciolo nessuna traccia

This American expression, meaning "nothing whatsoever", it is merely the reverse of an ancient saying, which read "in hide or hair", meaning "wholly, entirely". "Hide" here means "skin" and it refers to the entire outer coat of an animal