not see; she only saw the smile fade suddenly from Madame de
Frontignac's cheek, and her lips grow deadly white, while her heart
beat so that Mary could discern its flutterings under her black silk
bodice.

"Will the sea-nymphs punish the rash presumption of a mortal who
intrudes?" said Colonel Burr, stepping before them with a grace as
invincible and assured as if he had never had any past history with
either.

Mary started with a guilty blush, like a child detected in an unseemly
frolic, and put her hand to her head to take off the unwonted
adornments.

"Let me protest, in the name of the Graces," said Burr, who by that
time stood with easy calmness at her side; and as he spoke, he stayed
her hand with that gentle air of authority which made it the natural
impulse of most people to obey him. "It would be treason against the
picturesque," he added, "to spoil that toilette, so charmingly uniting
the wearer to the scene."

Mary was taken by surprise, and discomposed as every one is who finds
himself masquerading in attire foreign to his usual habits and
character; and therefore, when she would persist in taking it to
pieces, Burr found sufficient to alleviate the embarrassment of Madame
de Frontignac's utter silence in a playful run of protestations and
compliments.

"I think, Mary," said Madame de Frontignac, "that we had better be
returning to the house."