"Oh, I don't know."
"Got to be something with heft to it," said Willie. "'S got to overcome the resistance of the atmosphere."
"How about that paperweight?"
"'S too heavy."
"Well—"
"I know!" exclaimed William suddenly. "Gimme that little bottle of red ink. 'S just about right. And when it strikes it'll make a mark so's we can tell where we hit—like a regular target."
Scraggs hesitated.
"Ink costs money," he protested.
"But it's just the thing!" insisted Willie. "Besides, you can charge me for it in the cash account. Give it here!"
Conscience being thus satisfied the two eagerly placed the ink bottle in the proper receptacle, which Willie had fashioned out of a stogy box, twisted back the bow and aimed the apparatus at the slanting scuttle, which projected from a sort of penthouse upon the roof of the tenement house across the street.