North Sea [south part] 1878 compiled by James F. Imray FRGS published by James Imray and Son 89 & 102 Minories

Scale: circa 1:1750,000. Printed chart of the southern part of the North Sea. Shoals and banks marked and soundings. Variation marked. With ten insets. Lights coloured. Blue back Insets: 1. Bridlington Bay 1:95,000 bar; 2. The Downs 1:110,000 bar; 3. Dover 1:20,000 bar; 4. Ymuiden Haven 1:30,000 bar; 5. Helgoland 1:50,000 bar; 6. Entrance to the Hook of Holland Canal 1:37,000 bar; 7. Flushing 1:50,000 bar; 8. The Texel 1:75,000 bar; 9. Mouth of the River Elbe 1:90,000 bar; 10. Dunkerque 1:45,000 bar