mc5 - Riddle-me-ree Crescent

Collective consciousness riddle-making. The answer must be a London Underground station name.

My seventh's in ARKEN but but missing from SWALE

My eighth's not in HILL but can be seen in DALE

My first half is wealthy, my second's a hill

On second thoughts:
My first half is wealthy, my second's a rise
And the gardens thereat are a sight for sore eyes.

I think it's Richmond - is that right?

My first can be WRITTEN but cannot be DRAWN