when we make another reference

Rackham, Arthur (Illus.) See Barrie, Jas. M.

Last of all we receive the second part of "The Ring of the Niblung," which we embody in the former entry, converting it into

Wagner, Richard. The Ring of the Niblung;
transl. by Margt. Armour; illus. by Arthur
Rackham. 2 v. 1910-11
v. 1. The Rhinegold. The Valkyrie.
v. 2. Siegfried. The twilight of the gods.

If we have forgotten that the former reference was made, which is unlikely, we make another, as before

Rackham, Arthur (Illus.) See Wagner, Richard.

When the time comes for printing the catalogue, if it has not already been done, these references are all amalgamated into:

Rackham, Arthur (Illus.) See Barrie, Jas. M.;
Lamb, Chas. and Mary; Wagner, Richard.

A certain amount of knowledge and discretion is required in cataloguing the illustrators of books; cheap modern reprints of standard books with illustrations by Cruikshank or "Phiz" hardly call for notice by the cataloguer.