Because the Acts of the Apostles stops abruptly as if a piece had been lost or the author had had his pen taken from him or the original ending had been removed and almost meaningless material had been added on.
There are a great number of later versions:
1st Paul had an audience with Caesar Nero after he had been brought into prison. He was released and brought to Spain. But Nero had ordered his execution. Paul met Peter in prison and they suffered a martyr's death together.
Variation of Paul's symbols
Finished: 4 December 1997