What I did today

So I was away for 2 weeks and when I came back I found mouse droppings in my kitchen.  I own a 2 family house and the tenants downstairs reporteded that they saw a mouse.  I set traps and cleaned but today I was determined to find out how they were entering the house.  I searched inside the house and filled in any small openeings and then I ventured outside.  I found a basement window with a rotted sill,  so I removed the rotted window and poured new concrete.  I placed ply wood over the opening until I have money to purchase a new window.  I also mortered all the holes in the fieldstone foundation to prevent any new critters from coming.  Hope this works!