1. BM/DPB/MAPS/1 Reference (shelfmark): BM/DPB/MAPS/1 Title: Official Letters Collection Area: Corporate Archives Languages: English Date Range: 1857-1909 Extent: 9 volumes
2. BM/DPB/MAPS/1/1 Reference (shelfmark): BM/DPB/MAPS/1/1 Title: Volume 1 Collection Area: Corporate Archives Languages: English Date Range: 1857-1871 Extent: 1 volume, Paper
3. BM/DPB/MAPS/1/2 Reference (shelfmark): BM/DPB/MAPS/1/2 Title: Volume 2 Collection Area: Corporate Archives Languages: English Date Range: 1871-1873 Extent: 1 volume, Paper
4. BM/DPB/MAPS/1/5 Reference (shelfmark): BM/DPB/MAPS/1/5 Title: Volume 5 Collection Area: Corporate Archives Languages: English Date Range: 1877-1878 Extent: 1 volume, Paper
5. BM/DPB/MAPS/1/6 Reference (shelfmark): BM/DPB/MAPS/1/6 Title: Volume 6 Collection Area: Corporate Archives Languages: English Date Range: 1879-1880 Extent: 1 volume, Paper
6. BM/DPB/MAPS/1/7 Reference (shelfmark): BM/DPB/MAPS/1/7 Title: Volume 7 Collection Area: Corporate Archives Languages: English Date Range: 1875-1900 Extent: 1 volume, Paper
7. BM/DPB/MAPS/1/8 Reference (shelfmark): BM/DPB/MAPS/1/8 Title: Volume 8 Collection Area: Corporate Archives Languages: English Date Range: 1901-1905 Extent: 1 volume, Paper
8. BM/DPB/MAPS/1/9 Reference (shelfmark): BM/DPB/MAPS/1/9 Title: Volume 9 Collection Area: Corporate Archives Languages: English Date Range: 1906-1909 Extent: 1 volume, Paper
9. BM/DPB/MAPS/1/3 Reference (shelfmark): BM/DPB/MAPS/1/3 Title: Volume 3 correspondents A - M Collection Area: Corporate Archives Languages: English Date Range: 1874-1875 Extent: 1 volume, Paper
10. BM/DPB/MAPS/1/4 Reference (shelfmark): BM/DPB/MAPS/1/4 Title: Volume 4 correspondents A - M Collection Area: Corporate Archives Languages: English Date Range: 1875-1876 Extent: 1 volume, Paper