Further ablative examples

Identify where an ablative would be used to translate the following, and how it is being used:

1. Cicero was friends with many great men who thought that he was worthy of great honour.
2. Brutus killed Caesar with a sword in his right hand, along with other traitors.
3. When the messenger had descended from his horse, the commanded ask him for the message he had brought from the battle.
4. The soldiers advanced by night.
5. The men ate with their fingers.
6. A man with one eye came out of the sea and surprised everyone on the shore.
7. In the book it was written carefully by the poet that there would be many more Romans than stars.
8. The senator lacked money because he bought a house for much gold.
9. The river was crossed by Caesar on the tenth day.
10. Cool water flowed from the underground spring.