هيثم بن الأشعث صوابه (هيثم بن جهم) يأتي

His entry on Shamela

In our books

al-Mustadrak ala al-Sahihayn2 places
al-Mujam al-Kabir1 places

Some of his hadith: al-Mustadrak ala al-Sahihayn 6136