"It's givin' yer der trick dirt cheap—see?" said the professor. "I never sold it less dan twice dat ermount before. Dat's straight. I'll have ter make yer promise not ter tell it ter der odder chaps before I instructs yer."
"If I buy it it is mine," said Bruce.
"Come off der roof! You enters inter an' agreement wid me dat yer don't blow dis t'ing, ur I don't tell yer."
"What if I want to tell a particular friend?"
"Yer don't tell him. Dat's all. I had ter pay t'ree hunderd dollars ter learn dis, an' sign a 'greement dat I wouldn't give it erway. Jem Mace tort me dis trick w'en I sparred wid him in Liverpool. He says ter me, says he: 'Buster, ye're a boid, dat's wot ye are. If you knowed der trick of breakin' a bloke's wrist dere ain't no duffer in der woild dat can do yer. I'll show yer der crack fer sixty pound.' He wouldn't come down a little bit, an' I paid him wot he asked. Since dat time I've knocked roun' all over der woild, an' it's saved me life fife times. Dat was a cheap trick wot I got from old Jem, dat were. A dago pulled a knife on me oncet fer ter cut me wide open, but I broke der dago's wrist quicker dan yer can spit."
"Well, here is your money, and now I want to know that trick."
"Yer 'grees not ter tell it ter anybody?"
"Yes, I agree."
"Dat settles it."
Kelley took the money and carefully stowed it away in his clothes.