Charles now loved a woman whom, with swift presence of mind, she had bound to herself, and what no one else had succeeded in doing Barbara might accomplish.

Therefore the marquise had retired to the solitude which she hated, and hourly humbled herself to cringing flattery of a creature whom, on account of her birth, she scorned.

But Barbara was warned and, difficult as it often was for her to withstand the humble entreaties to which the old lady in waiting frequently condescended, persisted in her refusal.

Yet the unhappy mother did not give up hope, for as soon as the singer committed any act which she was obliged to conceal she could obtain power over her.  So she kept her eyes open and, whenever the Emperor sought the young girl and was alone with her, she stole into the garden and peered through the badly fitting window shutters into the lighted room which was the scene of the happiness of the ill-matched lovers.

What she overheard, however, only increased the feeling of powerlessness against the hated creature whom she so urgently needed; for the tenderness which Charles showed Barbara was so great that it not only filled the marquise with surprise and bitter envy, but also awakened the conviction that it must be a small matter for the singer to obtain from so ardent a lover far greater things than she had asked.

So she continued to watch and listen unweariedly, day after day and evening after evening, but always in vain.  She had not the most trivial thing for which Barbara could be seriously reproached to report to the confessor; yet De Soto desired nothing better, for Barbara still exerted an extremely favourable influence upon the Emperor’s mood.  Therefore it vexed him that Cassian informed him of many things which prevented his relying firmly upon her orthodoxy.

At any rate, there were Protestants among her visitors and, unfortunately, they included Herr Peter Schlumperger, whom De Soto knew as an active promoter of the apostasy of the Ratisbon burghers.  He had called upon her the second day after her arrival and remained a long time but, it is true, had not appeared again.  With the others also she held no regular intercourse—­nay, she scarcely seemed to enjoy their visits.  Thus the daughters of the Woller family from the Ark, who had appeared one afternoon, had been detained only a little longer by her than other Protestant matrons and maidens.

All this was scarcely sufficient to foster his anxiety; but Cassian reported one visit with which the case was different.  Barbara had not only received this guest alone, but she had kept him more than an hour, and the servant could swear that the young man to whom she sang long songs—­which, it is true, sounded like church music—­to the lute and also to the harp, was Erasmus Eckhart, the adopted son of the archtraitor, Dr. Hiltner, who had just obtained the degree of Master of Arts in Wittenberg.  This seemed suspicious, and induced De Soto to investigate the matter thoroughly.