These errors of description amongst medical writers have of course occasioned much obscurity and perplexity in the productions of travellers and historians, who have generally confounded all these diseases with the Hebrew leprosy, or the leprosy which for so long a period desolated the fairest portions of Europe, where every country was crowded with hospitals established for the exclusive relief of the malady. The number of leper-houses, as they were denominated, has been singularly exaggerated. Paris has been made to assert that there were nineteen thousand of these hospitals, whereas he merely stated that the Knights Hospitalers, under various patron saints, but more particularly St. Lazarus, were endowed with nineteen thousand manors to support their extensive establishments; and he thus clearly expressed himself: "_Habent Hospitalarii novemdecim millia maneriorum in Christianitate_." It appears that in the reign of Louis VIII., France had no less than two thousand of these hospitals. Leprosy was well known in the eighth century, and St. Ottomar and St. Nicholas, were considered the first founders of establishments for its treatment in France and in Germany. The Crusaders, however, by their connexions with the East, materially increased its inroads in Europe, and the disgusting malady appears to have been considered as a proof of holiness. Moehser, in his work "_De medicis equestri dignitate ornatis_," informs us that the Knights of the order of St. Lazarus were not only intrusted with the care of lepers, but admitted them into their noble order: their Grand Master was himself a leper. The Crusaders, returning from their useless wars, eaten up with the disease, received the honourable distinction of being _pauperes Christi, morbi beati Lazari languentes_. The most distinguished individuals in the land attended upon them with the utmost humility; and Robert, King of France, used to wash and kiss their filthy feet to keep himself in odour of sanctity. All these attentions, however, did not always prevent the lepers from complaining of their complicated sufferings, but they were exhorted by holy men (who of course had never experienced the miseries of the malady) to be of good comfort, as their illness was a blessed favour conferred upon them as the elect of the land. St. Louis thought the Sire de Joinville an unbeliever; for having once asked him which he would prefer, being a _mezieu_ or _laide_ (a leper), or having to reproach his conscience with any mortal sin, his favourite replied to the singular question, that he would rather be guilty of thirty deadly sins; whereupon the sanctified monarch severely rebuked him by telling him in the quaint language of the times, "Nulle si laide mezeuerie n'est, comme de estre en peche mortel."