This paper evaluates the contributions made by A. D. Deyermond and Manuel Alvar to the study of wonder tale topoi in the Libro de Apolonio (c. 1250), a Spanish translation and variant of the Historia Apollonii Regis Tyri (c. 400–500). In addition, it provides folktale types and motifs that have a thematic bearing on numerous episodes found in the Spanish romance, heretofore not mentioned by the two critics cited above.