Although only Appian's books on the  survive in their entirety, large parts of the other books, devoted to Rome's foreign wars, have also come down to us. The parts on the , the , and the  are very important historical sources.

His account of the emperor 's campaigns is completely lost, except for one single fragment that deals with  prophecy and belongs to the . It is a charming story, nevertheless. It was discovered in an unknown medieval manuscript, and published in 1869 by E. Miller. ---

[1] At the end of his twenty-fourth book, Appian tells the following story.

Once, during a night, when I was trying to make an escape from the Jews during the war in Egypt and tried to reach Arabia Petraea across a branch of the river, where a vessel was ready to bring me to Pelusium, I had an Arab as guide. I thought I was not far from my ship, but when he heard a crow screech at dawn, he was utterly confused and said "We have lost the way". And when the crow screeched again, he said "We have completely lost the way".

[2] Now, I was confused too and started to look if I could see someone on the road, but I didn't see someone, as is likely early in the morning, especially in a country where a war is being fought. But when the Arab heard the bird for the third time, he was very glad and said "We have favorably lost the way and have found a shortcut".

[3] I smiled, although I thought we were still lost and feared for my life. Everything was hostile and I could not return to my enemies, from which I was trying to escape. But because there was no alternative, I followed him and believed his prophecy. Right then, we unexpectedly saw another branch of the river, the part that is closest to Pelusium, and saw a galley passing, going in the direction of Pelusium. I went aboard, and this turned out to save my life: the vessel on the other branch had been captured by the Jews. Fortune had been kind to me by giving me this prophecy.

[4] The Arabs are, in general, pious prophets and farmers, and well acquainted with magical herbs. It comes as no surprise, therefore, that as farmers, as pious, prophetic people, and as experts in herbal and astral magic, they have received a warm welcome in Egypt, and that they have remained there among those like-minded souls.