The twelve Imams

Do you know there are a lot of narrations in Shia’s sources, which mentioned the number of twelve Imams?
Shaykh Ḥorr-e ʿĀmelī in the second volume of the valuable book “Ithbat Al-hudat” has gathered nine hundred and twenty seven narrations about the imamate1 of twelve Imams, which in most of them the number and name of Imams have been mentioned straightforward.