26th Early in the morning before the break of day 2 Indians crept upon their Hands & knees Approaching the camp to steal some Horses. They got within 3 rods of the guard before they were dis-coverd. ...
Just at dusk A tremendious alarm was given through the camp that Indians had Cralled up & taken Porter Rockwell & his horse & made off with him. Many men mounted there Horses & made off after him with all speed but it was soon discoverd that Rockwell was in the camp but two Horses were gone. Dr Richards & Br Little & about 20 men mounted & armed went in search of the Horses But found them not. It was believed the Indians took off the Horses.
[Source: Wilford Woodruff's Journal: 1833-1898 Typescript, Volumes 1-9, Edited by Scott G. Kenney, Signature Books 1993, http://amzn.to/newmormonstudies]