The Bobbsey Twins on the Deep Blue Sea

Hard cover; 248 pages; 1918; Grosset & Dunlap. The 11th book in the Bobbsey Twins series. Printed in the 1916-1925 G&D format. Cloth cover originally light green with fine weave. Blank endpapers. Tipped-in illustrations (frontispiece, plus three) on glossy stock. Post-text ads include The Girls of Central High 1-6;The Moving Picture Girls 1-7; The Outdoor Girls 1-7; and The Bobbsey Twins 1-8. Possibly first edition; certainly an early edition.