The great manuscript archives from this period solved matters such as determining direction of Mecca and time keeping are in grave danger of being destroyed by ravages of time.The great manuscript archives from this period solved matters such as determining direction of Mecca and time keeping are in grave danger of being destroyed by ravages of time.The great manuscript archives from this period solved matters such as determining direction of Mecca and time keeping are in grave danger of being destroyed by ravages of time.