Final answer:
Ragueneau is caught in disguise and manages to escape. The playwright may have done this to create suspense and intrigue.
Step-by-step explanation:
At the beginning of the act, Ragueneau is caught in disguise and slips through the fingers of the others. It is not clear how this happened. The playwright may have us believe this to create suspense and intrigue as Ragueneau has found out things that could ruin them and has plans that could lead to the fall of Richmond if he escapes.