The people who give their name to this river present some points of special interest. It is commonly supposed that the old "Kongo Empire" was a creation of the Portuguese. But Mbanza, afterwards rechristened "San Salvador," was already the capital of a powerful state when it was first visited by the expedition of 1491, from which time date its relations with Portugal. At first the Catholic missionaries had great success, thousands were at least baptised, and for a moment it seemed as if all the Congo lands were being swept into the fold. There were great rejoicings on the conversion of the _Mfumu_ ("Emperor") himself, on whom were lavished honours and Portuguese titles still borne by his present degenerate descendant, the Portuguese state pensioner, "Dom Pedro V, Catholic King of Kongo and its Dependencies." But Christianity never struck very deep roots, and, except in the vicinity of the Imperial and vassal Courts, heathenish practices of the worst description were continued down to the middle of the nineteenth century. About 1870 fresh efforts were made both by Protestant and Catholic missionaries to re-convert the people, who had little to remind them of their former faith except the ruins of the cathedral of San Salvador, crucifixes, banners, and other religious emblems handed down as heirlooms and regarded as potent fetishes by their owners. A like fate, it may be incidentally mentioned, has overtaken the efforts of the Portuguese missionaries to evangelise the natives of the east coast, where little now survives of their teachings but snatches of unintelligible songs to the Blessed Virgin, such as that still chanted by the Lower Zambesi boatmen and recorded by Mrs Pringle:-- Sina mama, sina mamai, Sina mama Maria, sina mamai ... Mary, I'm alone, mother I have none, Mother I have none, she and father both are gone, etc.[271]