sentences:  Ruskin was never careful about offending his employer.When he criticised Michelangelo in a lecture in June 1871 it was seen as an attack on the large collection of that artist's work in the Ashmolean Museum.Most controversial, from the point of view of the University authorities, spectators and the national press, was the digging scheme on Ferry Hinksey Road at North Hinksey, near Oxford, instigated by Ruskin in 1874, and continuing into 1875, which involved undergraduates in a road-mending scheme.