263. Hi-lo.
264. It places the present (see) before the past (saw).
265. Because there is a b in both.
266. Obscurity, in which may be found sour, city, sty, sot, buoy, tour, story, orb, orbit, rust, rut, bust, crust.
267. He was 30 years old.
268. Exe-te-r.
269. (Deaf and dumb alphabet.)
270. When they are fingered.
271. Day and night.
272. Camp-bell.