"Fat?" he repeated, glaring at Quint. "Did you say 'fat?'"

"Yes, fat—intellectually and corporeally fat! I want that kind of individual kept out. I don't trust them. I'm afraid of them. Their minds are atrophied. They are unmoral, possibly even criminal! I don't want them in my room snooping about to see what I have and what I'm doing. I don't want them to sneak in, eaten up with jealousy and envy, and try to damage the eggs of the Silver Moon butterfly because the honour and glory of hatching them would probably procure for me the Carnegie Educational Medal—"

"Why, you little, dried-up, protoplasmic atom!" burst out Boomly, his face suffused with passion, "Are you insinuating that I have any designs on your batch of eggs?"

"It's my belief," shouted Quint, "that you want that medal yourself, and that you put an ichneumon fly in my breeding-cage in hopes it would sting the eggs of the Silver Moon."

"If you found an ichneumon fly there," retorted Boomly, "you probably hatched it in mistake for a butterfly!" And he burst into a peal of contemptuous laughter, but his little, pig-like eyes under the heavy lids were furious.

"I now believe," said Quint, trembling with rage, "that you have criminally substituted a batch of common Plexippus eggs for the Silver Moon eggs I had in my breeding-cage! I believe you are sufficiently abandoned to do it!"

"Ha! Ha!" retorted Boomly scornfully. "I don't believe you ever had anything in your breeding-cage except a few clothes moths and cockroaches!"

Quint began to dance:

"You did take them!" he yelled; "and you left me a bunch of milkweed butterflies' eggs! Give me my eggs or I shall violently assault you!"

"Assault your grandmother!" remarked Boomly, with unscientific brevity. "What do you suppose I want of your ridiculous eggs? Haven't I enough eggs of Heliconius salome hatching to give me the Carnegie medal if I want it?"