José Díaz, Electra, Barcelona, 1901.

Havelock Ellis, "Electra and the progressive movement in Spain," in The Critic, vol. 39 (1901), pp. 213-217.

Havelock Ellis, "The Spirit of Present-day Spain," in The Atlantic Monthly, vol. 98 (1906), pp. 757-65.

A. Gassier, Théâtre espagnol, Paris, 1898, pp. 308-13.

J. Geddes, Jr., Introduction to edition of Marianela, New York, 1903.

Georges Lenormand, "A propos de l'Electra de D. Benito Pérez Galdós," in Revue hispanique, VIII (1901), pp. 567-73.

J. León Pagano, Al través de la España literaria, Barcelona, 1904, II, 77-112.

Eduardo de Lustonó, "El primer drama de Galdós," in Nuestro tiempo, 1902, I, pp. 155-65.

E. Martinenche, "El Abuelo," in Revue latine, IV, 419-28.

E. Martinenche, "Le théâtre de M. Pérez Galdós," in Revue des deux mondes, 5me période, vol. 32, pp. 815-50 (1906). [This is, as far as it goes, by far the best study yet made of Galdós' drama. It appeared in a Spanish translation in España moderna, no. 210, pp. 118-58.]