What does this mean ...
I read from Reader Digest a quote given by a person giving his reason for dislike a house on sale:

"The family dog, long departed, was stuffed and sanding next to the fireplace. RIP sparky."

I can't understand several things in this sentences.
1. long departed
2. was stuffed
3. RIP Sparky.

long departed = died/passed away
was stuffed = process where you preserve an animal so the body does not decay
RIP sparky = Rest In Peace (Sparky is the dog's name)