On February 22, 1847, Philip St. George Cooke submitted a report of his journey, printed by the U. S. Senate in 1849, as the "Official Journal of Lieutenant Colonel Philip St. George Cooke from Santa Fe, in New Mexico, to San Diego, in Upper California".
[1] Later in 1878 Cooke wrote a book "The Conquest of New Mexico and California" that covered the journey but in less detail than in his original report.
After recovering from their crossing came the task of building a wagon road 47 miles up to the San Felipe Valley and over Warner Pass in the Laguna Mountains to Warner's Ranch, overcoming the difficult terrain encountered building their road around Box Canyon.
From Warner's the battalion marched on existing roads 58 miles northwest through Aguanga and west to Temecula, then southwest to the San Luis Rey River, and west along the river, past Mission San Luis Rey to the Pacific Ocean.
The last march was south to Mission San Diego on El Camino Real.