1. Coolies Picking coffee Collection: Kroch Asia Rare Materials Archive Location: Sri Lanka Date: 1890-1920 Format: Image Photographer: Underwood & Underwood (American photography studio and publisher, established 1882, dissolved ca. 1940 ) Publisher: Underwood & Underwood number 29.
2. Picking tea leaves in Ceylon Collection: Kroch Asia Rare Materials Archive Location: Sri Lanka Date: 1890-1920 Format: Image Photographer: Keystone View Company (American publisher, 19th-20th centuries) Publisher: Keystone View Company number P52 (12111).