Nine in the second place means

A one-eyed man who is able to see.

The perseverance of a solitary man furthers.

Here the situation is that of a girl married to a man who has disappointed her. Man and wife ought to work together like a pair of eyes. Here the girl is left behind in loneliness; the man of her choice either has become unfaithful or has died. But she does not lost the inner light of loyalty. Thought the other eye is gone, she maintains her loyalty even in loneliness.