Niccolò and Maffeo Polo (1260-1269, 1271-1295)

From the Silk Road site:

Secondary sources:

Marco Polo, The Travels, tr.and introd. Ronald Latham (Harmondsworth, etc., 1958), esp. 34-39.

Leonardo Olschki, Marco Polo's Asia: An Introduction to His "Description of the World" Called "Il Milione" (Berkeley and L.A., 1960), 74-93.