from page 190 of DEVIL MAKE A THIRD:

"Yessir," he said, slowly, speaking low with a current of excitement in his voice. "That buildin' caught my eye the minute I saw it. It wasn't the biggest in New York, and till you get used to it, it's kinda funny lookin'. Shaped like a sad iron. They call it the Flatiron Building. They just built it to fit what land they had and that's what I aim to do." 

"You got a lot like that?" Jeff asked, reaching for a small glass and the whiskey bottle.

Buck grunted and shoved the bottle.

"Happy days," he said, and raised his glass. He drank his whiskey quickly and economically. First, he took a little water into his mouth, then he threw in the whiskey from a small glass and followed it with a long drink of plain water.

"Reckon I can find one," he said, when he had finished. (the FLATIRON BUILDING appears at 1:50 on the attached link) https://www.youtube.com/watch?v=FWtWJAmHuc8