Philip Cockrill (1912-2003) is considered to have been one of the leading authority on Liberian Philately.
Works
Cockrill is probably most known for his Liberia Series Booklets:
Liberia: The Cromwell Correspondence: Anglo-Liberian Boundary Commission 1879; Series Booklet No. 1 / Cockrill, Philip / c1980
Liberia: The Cancellations & Postmarks on the First Issues (1860-1869 & 1880): Series Booklet No. 2 / Cockrill, Philip / c1980
Liberia: Plating of the First Issues 1860-1869: Series Booklet No. 3 / Cockrill, Philip / c1980
Liberia: Forgeries of the First Issues (1860-1880): Series Booklet No. 4 / Cockrill, Philip / c1980
Liberia: Revenue Stamps: Series Booklet No. 5 / Cockrill, Philip / c1980
Liberia: External Postmarkings on Liberian Stamps: Series Booklet No. 6 / Cockrill, Philip / c1980
Liberia: German Maritime Cancellations on Liberian Stamps: Series Booklet No. 7 / Cockrill, Philip / c1980
Liberia: The Internal Postmarks & Cancellations: Series Booklet No. 8 / Cockrill, Philip / c1980
Liberia: The Provisional Surcharged Issues 1892-1918: Series Booklet No. 9 / Cockrill, Philip / c1980
Liberia: The Elder Dempster Line & British Paquebot Cancellations: Series Booklet No. 10 / Cockrill, Philip / c1980
Liberia: The Provisional Surcharged Issues 1920-1927: Series Booklet No. 21 / Cockrill, Philip / c1980
Liberia: The Provisional Surcharged Issues 1918 & 1936-1945: Series Booklet No. 22 / Cockrill, Philip / c1980
Liberia: Plating The 1880 Issues: Series Booklet No. 23 / Cockrill, Philip / c1980
Liberia: Plating The 1881 3 Cents and 1882 Numeral Issues: Series Booklet No. 24 / Cockrill, Philip / c1980
Liberia: Postal History & Stamps 1835-1945: Series Booklet No. 25 / Cockrill, Philip / c1980
Further reading
- In Memoriam / p. 2 / Journal of the Liberian Philatelic Society / Anon / Jul-Sep 2003