Complex sentence: This move was immediately (June 18,1922) denounced by Agathangel as unlawful and uncanonical--however, for a brief while it seemed that the Renovationists have gotten the upper hand.
Split into simpler sentences: This move was quickly (June 18,1922) denounced by Agathangel as unlawful and uncanonical. However, for a brief time it seemed that the Renovationists had gotten the upper hand.