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In page Spanish missions in California:

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In September 1821, the Rev. Mariano Payeras, "Comisario Prefecto" of the California missions, visited Cañada de Santa Ysabel east of Mission San Diego de Alcalá as part of a plan to establish an entire chain of inland missions. The Santa Ysabel Asistencia had been founded in 1818 as a "mother" mission. However, the plan's expansion never came to fruition.[citation needed]