The Girl Aviators and The Phantom Airship

Popular children's novel first published around 1900, part of the Girl Aviators series. The story begins: "Roy! Roy! where are you?" Peggy Prescott came flying down the red-brick path, a rustling newspaper clutched in her hand. "Here I am, sis,--what's up?" The door of a long, low shed at the farther end of the old-fashioned garden opened as a clattering sound of hammering abruptly ceased. Roy Prescott, a wavy-haired, blue-eyed lad of seventeen, or thereabouts, stood in the portal. He looked very business-like in his khaki trousers, blue shirt and rolled up sleeves. In his hand was a shiny hammer."