How would you mount a partition by its UUID/label, when it's not listed in /dev by the UUID/label?

# blkid
/dev/loop0: TYPE="squashfs" 
/dev/loop1: UUID="81200825-ccb6-4370-9e04-dbf763b0dbb6" TYPE="ext3" 
/dev/sda1: LABEL="/" UUID="2639-4A0E" TYPE="vfat" 
/dev/sda5: LABEL="Puppy" UUID="0a86140e-c4ec-4842-b2e0-7eb8c76b3a4e" TYPE="ext4" /dev/sda6: UUID="b6455bbc-9451-47f1-b0bb-2f6bdbb7d2fe" TYPE="swap" 
/dev/sda7: LABEL="Kubuntu" UUID="c3401d73-0c85-43ba-abf5-dc18b525f3e7" TYPE="ext4" 
/dev/sda8: LABEL="Files" UUID="dfb4fb3b-b012-4f41-8bad-c563492a9f99" TYPE="ext4" /dev/loop4: TYPE="squashfs" 
# mount -L 2639-4A0E /mnt/sda1
mount: no such partition found
#

:-)~MIKE~(-: