Master of this school

[kmcbears1]

No: HPFGUIDX 111800

Just a comment on this topic -  

Could Master of this school be a title for the number 3 person in 
charge?

We have DD - Headmaster, McGonagall - Deputy Headmistress, Snape - 
Master of school.

We often see DD, McGonagall, and Snape together when dealing with 
problems around the school.  Also, McGonagall and Snape have a 
different relationship (friendly rivalry) with each other than they 
have with the rest of the staff.  Snape often knows things that the 
other teachers do not know because IMO he is part of the 
administration staff of Hogwarts.

So my vote goes to the Master of the School being the person who gets 
the reigns when both the Headmaster/mistress and Deputy 
Headmaster/mistress are absent or unavailable.  The Master of the 
School would have remained at Hogwarts in the PS/SS opening chapter 
when DD and McGonagall were at Privet Drive.

- Karen