This document provides biographical information on key figures in the early Pentecostal movement and their roles in spreading Pentecostalism in the early 20th century. It discusses Evan Roberts and the Welsh Revival, Charles Parham and the speaking in tongues at Bethel Bible School, William Seymour and the Azusa Street Revival in Los Angeles, and five key characteristics of the Azusa Street Revival including a hunger for God, love across barriers, commitment to Scripture, evangelism, and restoring the New Testament church.