The name of the house was actually Overchurch Hill, and I actually confirmed this today from old deeds at the Cheshire Archives in Chester.
The house was built before 1860 by Thomas Webster, brother of William Webster of Upton Hall. The house passed to George Webster in 1876.
Frank Oscar Paul bought the house in about 1919, he owned flour mills on the East Float in Wallasey. As greasby_lad says, he did a lot for the local scout movement.
Mr Paul left Overchurch in 1941, moving first to Caldy and then to Ness.
I have only seen one picture of Overchurch Hill, and unfortunatly, I don't have it.