Big Brother/Little Brother

Death to Dream: Hiya, big brother.
-Neil Gaiman, The Sandman: Season Of Mists (New York, 1992), p. 102, panel 3.

Death to Dream: ...but the dead are coming back, little brother.
-op. cit., p. 103, panel 5.

Which?

Various Comics Converging On The Sandman

Cain hosted The House of Mystery.
Abel hosted The House of Secrets.
Lucien hosted Tales of Ghost Castle.
An unnamed woman with a raven hosted Dark Mansion of Forbidden Love.
Eve with a raven appeared in Secrets of Sinister House, Secrets of Haunted House and Plop!
The Three Witches hosted The Witching Hour.
Matt Cable, Cain and Abel appeared in Swamp Thing. 
A tall man in a frock coat was Adam and becomes a raven in Lilith by George MacDonald.

Thus, nine comics and one novel with Adam, Eve, Cain and Abel all present.

Cain and Abel and their Houses are in the Dreaming.
Lucien wears a frock coat and was Morpheus' first raven.
Ghost Castle was Morpheus' castle during his imprisonment.
The unnamed woman is Eve who lives in a cave in the Dreaming.
Matthew, Morpheus' current raven, was Matt Cable.

Thus, Neil Gaiman weaves diverse strands together.