[Checking it with the other answers. Fits with ten down, but he doesn't know one down, so that doesn't really help all that much.]
Y'sure it's you? There's gotta be someone else around here with a name that starts with- . . . [Eraser is go. Re-filling it in: M-A-X-W-E-L-L.] There, see? [Handing it back.]