A: notebooks (2) of measurements of microseisms by Milne-Shaw seismographs, 1929-40 & 1952-8;
B: memo (1957) by E.F. Baxter re work at the Observatory;
C: list (1955) of missing seismograph records and list of seismograms on loan;
D: correspondence (1954-81) between Baxter and seismological stations re loan of seismograms of earthquakes recorded at Durham;
E: further correspondence (1976-81) re loan of Durham seismograms;
F: correspondence (1964-85) of International Seismological Centre with Durham.