manual alphabet

One who is entirely dependent upon the manual alphabet has always a sense of restraint, of narrowness.

One who reads or talks to me spells with his hand, using the single-hand manual alphabet generally employed by the deaf.

Just here, perhaps, I had better explain our use of the manual alphabet, which seems to puzzle people who do not know us.

Miss Keller's reading of the manual alphabet by her sense of touch seems to cause some perplexity.

Books supplemented, perhaps equaled in importance the manual alphabet, as a means of teaching language.