Sam got Frodo's last letter only a few hours before his return.

As it was given him by his brother, he opened it quickly and read it's contents.

When he had finished, he had tears in his eyes. "I really do mean alot to 'im", he said to himself as he sat by a warm little fire. "He really does need me. And I need him. He knows that. I wanted to see if he knew that I need 'im. And he does care about himself being needed by me."

Sam sat there for quite a while, reading again and again those lovely words: I knew you needed me.....Of, course I still need you, Sam.....I need you the most. 

"I need you the most", he repeated to himself, "Samwise, he needs you. You'd better to help 'im whenever and however you can."

Sam waited to read the elvish story until Frodo came home. He couldn't possibly read it himself anyway, with all those tears of joy, contentedness, and overwhelming love blocking his sight.

"Sam! Mister Frodo's back!"