Your comments reminded me of this anecdote about Arthur Whitney:
"The k binary weighs in at about 50Kb. Someone asked about the interpreter source code. A frown flickered across the face of our visitor from Microsoft: what could be interesting about that? “The source is currently 264 lines of C,” said Arthur. I thought I heard a sotto voce “that’s not possible.” Arthur showed us how he had arranged his source code in five files so that he could edit any one of them without scrolling. “Hate scrolling,” he mumbled."
Source: http://archive.vector.org.uk/art10500700
I suspect his code looks a lot like the J incunabulum: