Through the Grand Canyon from Wyoming to Mexico

The Last Portage. The rocks were ice-filmed. Note potholes...... 270

Mooney Falls: Ha Va Su Canyon................................... 274

Watching for the signal fire. Mrs. Emery and Edith Kolb......... 278

The granite gorge near Bright Angel Trail....................... 282

The Grand Canyon from the head of Bright Angel Trail............ 286

The Cork Screw: lower end of Bright Angel Trail................. 290

Zoroaster Temple from the end of Bright Angel Trail............. 298

Winter in the Grand Canyon from the Rim......................... 308

Winter in the Grand Canyon at the River......................... 308

A vaquero in the making......................................... 318

Cliff swallows' nests. Found from Wyoming to Mexico............. 318

Steam vents beside Volcanic Lake................................ 326

Cocopah Mountain, Mexico........................................ 326

Ten miles from the Gulf of California. Coming up on a twenty-foot t