The ritual of Invocation demands that the Officiant be pure. We have already described the complex operations to be followed in order to call those that sleep in superior dimensions. We shall for the present limit ourselves to the sign of mutual recognition used amongst their number by adepts of the cult of the Old Ones. The sign also serves as protection when in the presence of a servant of evil.
The sign resembles a blessing, save that the first and little fingers are both folded beneath the thumb, whilst the second and third fingers are held up. It would appear that this sign has no effect on adepts of a certain rank with knowledge of particular secrets contained in the Corpus Demonicus. The use of such signs is not without considerable risk to the user during any attempt to call upon Those from Without.