Who killed John Keats?

I only know we loved in vain; I only feel — farewell! farewell!

When we two parted In silence and tears, Half brokenhearted, To sever for years.

Because He is all-powerful, must all-good, too, follow? I judge but by the fruits—and they are bitter— Which I must feed on for a fault not mine.

Farewell! if ever fondest prayer For other's weal avail'd on high, Mine will not all be lost in air, But waft thy name beyond the sky.

When age chills the blood, when our pleasures are past— For years fleet away with the wings of the dove— The dearest remembrance will still be the last, Our sweetest memorial the first kiss of love.

In secret we met In silence I grieve, That thy heart could forget, Thy spirit deceive. If I should meet thee After long years,