1. all but = all except
There were 10 eggs and I ate all but 2 of them.
( I ate 8 eggs.)
2. down to = all that remains
I used to be a millionaire but now I'm down to my last thousand.
(I had $1,000,000. Now I have $1,000.)
"We are not wholly bad or good, who live our lives under Milk Wood"
prayer of the Reverend Eli Jenkins in Under Milk Wood by Dylan Thomas