Shadows long before me lie,
beneath the ever-bending sky,
but islands lie behind the Sun
that I shall raise ere all is done;
lands there are to west of West,
where night is quiet and sleep is rest.
Guided by the Lonely Star,
beyond the utmost harbour-bar,
I'll find the heavens fair and free,
and beaches of the Starlit Sea.
Ship, my ship! I seek the West,
and fields and mountains ever blest.
Farewell to Middle-earth at last.
I see the Star above my mast!
Bilbo was past 131 years old by the time he departed Middle Earth – making him the oldest hobbit to have ever lived. 
 This unnaturally long lifespan can be at least partly attributed to his tenure as a ring-bearer, which grants extended life expectancy (Sméagol lived for nearly 600 years).