William L. Finley with a camera on a tripod under a rock ledge photographing Sierra hermit thrush chicks in their nest near Paradise River in Mount Rainier National Park.

A camera on a tripod under a rock ledge set up to photograph Sierra hermit thrush chicks in their nest near Paradise River in Mount Rainier National Park.

Two men (lower right) anchoring a tent to a small ledge on the side of Three Arch Rock. Murres and other sea birds are perched en masse upon the rock.

Dallas Lore Sharp, his son, Dallas Lore Sharp Jr., and Herman Bohlman (lower right) standing on a small ledge on the side of Three Arch Rock. Their camp is anchored to the rocks in the center. Murres and other...

Dallas Lore Sharp, his son, Dallas Lore Sharp Jr., and Herman Bohlman (lower right) anchoring a tent to a small ledge on the side of Three Arch Rock. Murres and other sea birds are perched en masse upon the...

William Finley Jr. pointing to a bluebird perched on Phoebe Katherine Finley’s finger. Image note: used as an illustration in the 1915 book, Little Bird Blue.

William Finley Jr. pointing to a bluebird perched on Phoebe Katherine Finley’s finger. Image note: used as an illustration in the 1915 book, Little Bird Blue.

William Finley Jr. pointing to a bluebird perched on Phoebe Katherine Finley’s finger. Image note: used as an illustration in the 1915 book, Little Bird Blue.

Phoebe Katherine Finley pointing at a bluebird perched on the shoulder of William Finley Jr. Image note: used as an illustration in the 1915 book, Little Bird Blue.

Phoebe Katherine Finley pointing at a bluebird perched on the shoulder of William Finley Jr. Image note: used as an illustration in the 1915 book, Little Bird Blue.