A quiet drawing period

An original notice containing five intentional errors.

The period are intended for independent drawing in the gallery. Artists should brought their own sketchbook, while suitible chair's are availble near the entrance. Please ask before moving a seat into a narrow route. The attendant will explain which spaces must remain clear. The session does not include a formal lesson, although a short introductory talk will identify the works on display and provide useful background information.

Proofread the notice. Identify the five errors and write the correct forms. You do not need to rewrite the whole passage.