Plate 7. — Street scenes — evolutionary sequence, a, C'alle de la Montana, an nnpaved street on the margin of town 

 h, The col:)blestone-paved C'alle del Abasto Viejo at an exit from town, c. View up Calle Benito Juarez — a modern 

 paved street. 



(For explanation, sec p. 233.) 



