Antique English Victorian Sterling Silver Mug Made by Henry John Lias & Son, London, England.  It is stamped with an 1862 London, England sterling silver hallmark, the bottom is stamped "324" & is also stamped with a "Henry John Lias & Son" maker's mark.  It is in good condition, there are a few very minor dings, some light marks, scratches, soiling, stains, tarnish & wear. 
 
It measures 8.5cm tall & 7.5cm at its widest.