After parading before their admiring relatives, they decided to play a joke on Eliza.

She had not yet seen them, so they slipped downstairs and out the front door, and then closing it softly behind them, they rang the bell.
Eliza came to the door, and utterly failed to recognize the children.
"Does Mrs.Sherwood live here ?" asked King, in a thin, disguised voice.
"Yes, ma'am," said Eliza, not knowing the children, "but--" gazing in surprise at the quaint, old-fashioned dresses and bobbing bonnets.
"Please tell her her two aunts from Philadelphia are here," said Marjorie, but she could not disguise her voice as well as King, and Eliza suddenly recognized it.
"Two aunts from Phillydelphy, is it ?" she said.

"More likes it's too loonytics from Crazyland! What will ye mischiefs be cuttin' up next! But, faith, ye're the bonny ould ladies, and if ye'll come in and take a seat, I'll tell the missus ye're here." But, having fooled Eliza, the fun was over in that direction, and the Quaker ladies trotted away to make a call on Carter.
Just at first he didn't know them, and thought the two ladies were coming to see him.

But in a moment he saw who they were, and the good-natured man entered at once into the game..