 Balfour 's first years of architectural practice consisted of small projects for family and friends . These included the restoration of Inveraray Castle for his father @-@ in @-@ law the Duke of Argyll , an extension to his brother Arthur 's hunting lodge Strathconan House in Ross @-@ shire , and the church of St Mary Magdalene in the hamlet of Hatfield Hyde . The church , which is now in Welwyn Garden City , was originally known as Hyde Chapel . Built as a chapel of ease within the parish of Hatfield for Balfour 's uncle the Marquis of Salisbury , it became the parish church of Hatfield Hyde in 1928 . 
