All 3 Uses

although
in
The Return of the King
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It was indeed in deepening gloom that the king came to Edoras, although it was then but noon by the hour.†
Chpt 5.3 *

although = even though -- used to connect contrasting ideas
In that there now seems no life, although it is unbroken.†
Chpt 5.8
Merry was summoned and rode away with the wains that took store of goods to Osgiliath and thence by ship to Cair Andros; but Faramir did not go, for now being healed he took upon him his authority and the Stewardship, although it was only for a little while, and his duty was to prepare for one who should replace him.†
Chpt 6.5

Definitions:

(1) (although)
even though -- used to introduce an idea that contrasts with or makes the main statement surprising

At the start of a sentence, although can play a role similar to words like however, yet, still, even so, on the other hand, or nonetheless—all of which signal contrast. In the middle of a sentence, although can sometimes be used where but or though might also work, but though or but often sound more natural. For example, "She's a great teacher, though not the most popular" is usually smoother than "She's a great teacher, although not the most popular."
(2) (meaning too rare to warrant focus)