1. BM/DPB/PK/4 Reference (shelfmark): BM/DPB/PK/4 Title: Principal Keepers' General correspondence Collection Area: Corporate Archives Languages: English Date Range: 1939-1961 Extent: 176 Files
2. BM/DPB/PK/4/2 Reference (shelfmark): BM/DPB/PK/4/2 Title: A Collection Area: Corporate Archives Languages: English Date Range: 1949 Extent: 1 File, Paper
3. BM/DPB/PK/4/3 Reference (shelfmark): BM/DPB/PK/4/3 Title: B Collection Area: Corporate Archives Languages: English Date Range: 1949 Extent: 1 File, Paper
4. BM/DPB/PK/4/10 Reference (shelfmark): BM/DPB/PK/4/10 Title: S Collection Area: Corporate Archives Languages: English Date Range: 1949 Extent: 1 File, Paper
5. BM/DPB/PK/4/15 Reference (shelfmark): BM/DPB/PK/4/15 Title: C Collection Area: Corporate Archives Languages: English Date Range: 1950 Extent: 1 File, Paper
6. BM/DPB/PK/4/22 Reference (shelfmark): BM/DPB/PK/4/22 Title: S Collection Area: Corporate Archives Languages: English Date Range: 1950 Extent: 1 File, Paper
7. BM/DPB/PK/4/24 Reference (shelfmark): BM/DPB/PK/4/24 Title: A Collection Area: Corporate Archives Languages: English Date Range: 1951 Extent: 1 File, Paper
8. BM/DPB/PK/4/29 Reference (shelfmark): BM/DPB/PK/4/29 Title: D Collection Area: Corporate Archives Languages: English Date Range: 1951 Extent: 1 File, Paper
9. BM/DPB/PK/4/30 Reference (shelfmark): BM/DPB/PK/4/30 Title: E Collection Area: Corporate Archives Languages: English Date Range: 1951 Extent: 1 File, Paper
10. BM/DPB/PK/4/31 Reference (shelfmark): BM/DPB/PK/4/31 Title: F Collection Area: Corporate Archives Languages: English Date Range: 1951 Extent: 1 File, Paper