Conversation so far:
When did the formation begin?
On 20 July 1976, childhood friends Sumner and Hook separately attended a Sex Pistols show at the Manchester Lesser Free Trade Hall.
How did that turn out?
The following day Hook borrowed PS35 from his mother to buy a bass guitar.
What happened later on with the formation?
In August 1977, the band placed an advertisement in a music shop window seeking a replacement drummer.

Question: Did they find a replacement drummer?
Self-contained rewrite: Did Joy Division find a replacement drummer?