Forgotten by the merrymakers, Marjorie stood alone upon the lawn, clenching her small fists, watching the new dance at its high tide, and hating it with a hatred that made every inch of her tremble.  And, perhaps because jealousy is a great awakener of the virtues, she had a perception of something in it worse than lack of dignity—­something vaguely but outrageously reprehensible.  Finally, when Penrod brushed by her, touched her with his elbow, and, did not even see her, Marjorie’s state of mind (not unmingled with emotion!) became dangerous.  In fact, a trained nurse, chancing to observe her at this juncture, would probably have advised that she be taken home and put to bed.  Marjorie was on the verge of hysterics.

She saw Fanchon and Penrod assume the double embrace required by the dance; the “Slingo Sligo Slide” burst from the orchestra like the lunatic shriek of a gin-maddened nigger; and all the little couples began to bob and dip and sway.

Marjorie made a scene.  She sprang upon the platform and stamped her foot.

“Penrod Schofield!” she shouted.  “You behave yourself!”

The remarkable girl took Penrod by the ear.  By his ear she swung him away from Fanchon and faced him toward the lawn.

“You march straight out of here!” she commanded.

Penrod marched.

He was stunned; obeyed automatically, without question, and had very little realization of what was happening to him.  Altogether, and without reason, he was in precisely the condition of an elderly spouse detected in flagrant misbehaviour.  Marjorie, similarly, was in precisely the condition of the party who detects such misbehaviour.  It may be added that she had acted with a promptness, a decision and a disregard of social consequences all to be commended to the attention of ladies in like predicament.

“You ought to be ashamed of yourself!” she raged, when they reached the lawn.  “Aren’t you ashamed of yourself?”

“What for?” he inquired, helplessly.

“You be quiet!”

“But what’d I do, Marjorie? I haven’t done anything to you,” he pleaded.  “I haven’t even seen you, all aftern——­”

“You be quiet!” she cried, tears filling her eyes.  “Keep still!  You ugly boy!  Shut up!”

She slapped him.

He should have understood from this how much she cared for him.  But he rubbed his cheek and declared ruefully: 

“I’ll never speak to you again!”

“You will, too!” she sobbed, passionately.

“I will not!”

He turned to leave her, but paused.

His mother, his sister Margaret, and their grownup friends had finished their tea and were approaching from the house.  Other parents and guardians were with them, coming for their children; and there were carriages and automobiles waiting in the street.  But the “Slingo Slide” went on, regardless.

The group of grown-up people hesitated and came to a halt, gazing at the pavilion.