[RightWhale]

English only? X is the secret sign for Christ, has been since the beginning.

[OSHA]

In the times of Roman oppression the secret sign for Christians to recognize one another was the fish. A believer would draw a simple curve in the dust. If the other person was also a believer he would draw a curve in the opposite direction forming a fish. A swish of the foot and the evidence was gone. To a non-Christian the line in the dirt meant nothing.