what was the parsons role in evans escape from the jail

The invigilator who had to come originally was resting at his study since 8 in Morning. The Mcleery who invigilated the exam and was there with Evans, was diguised friend of him. He helped in follwoing ways:

1) He gav Evans the necessary details of the hotel using the code no.

2) He remained as a guard and indicator when Evans put on the beard and collar for impersonating him for the future plans

3) He also brough with him, the rubber tube of blood required to misguide the authorites.