Twenty-three all out?

Over the winter months I became aware of what I took to be a mouse in our garden shed.  Come May I decided I ought to make an effort to encourage him away. 

I bought a couple of humane mouse traps - and caught 4 (2X2) the next day!  The total now stands at 23 - all taken to our favourite forest walk and released.  None for four days now and I am hoping we are uninfested.  Uninfested - a new word perhaps?