This work resulted in Moravian societies in counties Antrim, Down, Londonderry, Armagh, Tyrone, Cavan and Donegal.

The Turkish commander put a price on Zula's head and this, together with subsequent ambushes, appears to have induced a nervous state of mind for the remainder of the latter's life.

In Dublin, Zula met a Moravian school teacher called Ann Linfoot who knew Greek and was able to converse with him.

The congregation continued to expand and, in January 1837, Zula was ordained by Hans Peter Hallbeck, a Moravian bishop from South Africa.

His widow, Ann, continued to live in the manse and ran a boarding school for 'Select Young Ladies' until her own death in 1858.

A curious feature of Kilwarlin Moravian Church is that Zula, at his own expense, had the grounds landscaped to represent the terrain of the ancient Battle of Thermopylæ in which the Spartan army saved Athens from attack by the Persians.