Such a peculiar odor, too! I have spent hours in trying to analyze it, to find what it smelled like. It is not bad—at first, and very gentle, but quite the subtlest, most enduring odor I ever met. In this damp weather it is awful, I wake up in the night and find it hanging over me. It used to disturb me at first. I thought seriously of burning the house—to reach the smell. But now I am used to it. The only thing I can think of that it is like is the COLOR of the paper! A yellow smell.
From "Yellow Paper" by Charlotte Perkins Gilman (1892)
I just wonder the above sentence is grammatically correct. Could it be re-written as "what it is like is" ? Or am I missing something here?