the French book maketh mention.

CHAPTER XII. How Sir Launcelot began to sicken, and after died, whose
body was borne to Joyous Gard for to be buried.

THEN Sir Launcelot never after ate but little meat, ne drank, till he
was dead. For then he sickened more and more, and dried, and dwined
away. For the Bishop nor none of his fellows might not make him to eat,
and little he drank, that he was waxen by a cubit shorter than he was,
that the people could not know him. For evermore, day and night, he
prayed, but sometime he slumbered a broken sleep; ever he was lying
grovelling on the tomb of King Arthur and Queen Guenever. And there was
no comfort that the Bishop, nor Sir Bors, nor none of his fellows, could
make him, it availed not. So within six weeks after, Sir Launcelot fell
sick, and lay in his bed; and then he sent for the Bishop that there was
hermit, and all his true fellows. Then Sir Launcelot said with dreary
steven: Sir Bishop, I pray you give to me all my rites that longeth to
a Christian man. It shall not need you, said the hermit and all his
fellows, it is but heaviness of your blood, ye shall be well mended by
the grace of God to-morn. My fair lords, said Sir Launcelot, wit you
well my careful body will into the earth, I have warning more than now
I will say; therefore give me my rites. So when he was houseled and
anealed, and had all that a Christian man ought to have, he prayed the
Bishop that his fellows might bear his body to Joyous Gard. Some men say
it was Alnwick, and some men say it was Bamborough. Howbeit, said Sir
Launcelot, me repenteth sore, but I made mine avow sometime, that in
Joyous Gard I would be buried. And because of breaking of mine avow, I
pray you all, lead me thither. Then there was weeping and wringing of
hands among his fellows.

So at a season of the night they all went to their beds, for they all
lay in one chamber. And so after midnight, against day, the Bishop
[that] then was hermit, as he lay in his bed asleep, he fell upon a
great laughter. And therewith all the fellowship awoke, and came to the
Bishop, and asked him what he ailed. Ah Jesu mercy, said the Bishop,
why did ye awake me? I was never in all my life so merry and so well
at ease. Wherefore? said Sir Bors. Truly said the Bishop, here was Sir
Launcelot with me with mo angels than ever I saw men in one day. And
I saw the angels heave up Sir Launcelot unto heaven, and the gates of
heaven opened against him. It is