Is The Potter's Invisibility Cloak A Relic?

[Tonks]

No: HPFGUIDX 158397

> Diego:
> Reading this mail made wonder about a couple of comments of DD 
about the IC, both of them during his visit to Harry (Snip)"I shall 
send them to the Burrow to await us there. However, I
> would like you to bring your Invisibility Cloak . . . just in 
case."
> 
> 2) Before going away (after the visit to , he gave some advice to
> Harry, including: "Firstly, I wish you to keep your Invisibility 
Cloak with you at all times from this moment onward. Even within 
Hogwarts itself. Just in case, you understand me?"


Tonks:
It does seem that the cloak is very important, perhaps for more than 
to keep Harry from being seen. .. or not??

I have been pondering the cloak clue.  Adding a bit of this and that 
from other peoples ideas this is what I have come up with:

We do not know how and when James got the cloak.  It may or may not 
be the cloak of Gryffindor. We know that James and Harry are not in 
the blood line of Gryffindor.  I think that DD is the last 
descendent of Gryffindor. And when JKR said that we should think 
more about DD's relatives, this is what she means.

James gave the cloak to DD.  We are to ask why.  I think it may be 
that the cloak at one time belonged to DD.  Again it could be the 
cloak of Gryffindor.  Remember that DD said that the sword was the 
only "known" relic of Gryffindor.  That statement leaves the door 
open for there being another one that is not known. 

If the cloak were Gryffindor's, I would think that only DD would 
know this.  Perhaps he gave it to James for some reason.  DD did not 
need it himself, and perhaps it does not have any special powers.  
Or maybe it does.  Either way, I think that it belonged to DD and he 
gave it to James.  When, where, why, I don't know.  But when James 
thought that he and his family might be killed, and he knew that the 
cloak would be of no help, he gave it back to DD.  If there were 
some noble reason for DD to have given it to James to begin with, 
James may have given it back expecting DD to pass it on to another 
student just as he had to James.

I wonder if the cloak has some important role in the 7th book other 
than to just hide someone?

Tonks_op