A 37-year-old man from Hemel Hempstead has been charged with two offences after a stabbing in the town last Friday.
Emergency services attended the scene in Highfield after reports a man had been attacked.
The victim, in his 50s, was injured in the serious assault, which took place in Wensleydale on Friday afternoon.
Police, an ambulance and a paramedic officer attended the scene shortly after 1pm.
A spokesman for the East England Ambulance Service Trust said the victim remained stable as he was treated at the scene for a leg wound, caused by a possible stabbing.
Paramedics managed to stem the bleeding and the man was then taken to Watford General Hospital, though his condition was not thought to be life-threatening.
Robert Napier, initially thought to have been from Watford, but later confirmed to be living at the Highfield address, was arrested in connection with the incident and later charged with a grievous bodily harm assault and also assaulting a police officer.
He appeared at Hatfield Remand Court on Saturday and will be kept in custody until he appears before St Albans Crown Court on Friday, October 3.
Call the police non-emergency number 101 quoting the reference 386 of September 19 with any information.