He was back in Scotland before 21 June , when for the third time he was appointed an Extraordinary Lord of Session .
He was one of the three Scotland commissioners who negotiated the treaty of alliance with England , which was signed 5 July .
He was back in Scotland before 21 June , when for the third time he was appointed an Extraordinary Lord of Session , and he was one of the three Scottish commissioners who negotiated the treaty of alliance with England , which was signed 5 July .