Monthly copies Jan 1880 - Sept1908, each made up of the
weekly copies for the previous month.
Monthly copies only, Oct1908 - Sep1941.
Monthly copies of 'Girl's Own Paper and Heiress',
small format, Oct1941 - Feb 1950.
Continued as 'Heiress', 1950-1956.
A note on dating of bound volumes of the GOP
Many volumes carry both date and volume number on each weekly
part and so present no problem.
Most bound volume run from October in one year to September of
the next, so each volume extends into two calendar years.
If a date is stamped on the spine, it is normally the date of
the year in which the volume ended.
If the volume number is known, the date at which the volume
ended can be found by adding the volume number to the date 1879.
Thus, volume 17 ended in September 1896.
If the date at which the volume ended is known, the volume
number is found by subtracting 1879 from this date. Thus, the
volume which ended in September1902 was volume 23.
A list of Extras published with the GOP, with names and dates
Christmas Roses 1881
Silver Sails 1882
Christmas Carillon 1882
Summer Quiet 1883
Winter Leaves 1883
Sunlight 1884
Snowdrifts 1884
Sheets of Daisies 1885
Snowdrops 1885
Lily Leaves 1886
Feathery Flakes 1886
Victoria's Laurel 1887
Evergreen 1887
Rosebud Garden 1888
Household Harmony 1888
Rosemary 1889
Christmas Cherries 1889
A Garden of Gilly Flowers 1890
Virgin Snow 1890
Meadowsweet 1891
Lovelight 1891
Maidenhair 1892
Starshine 1892
Lilywhite 1893
Morning of the Year 1893
Mignonette 1894
Robin Redbreast 1894
London Pride 1895
Herald Angels 1895
Summer Spices 1896
Our Christmas Wreath 1896
Queen of Queens - Diamond Jubilee Number 1897
Christmas Chimes 1897
Honied Hours 1898
Wintersweet 1898
Sundrops 1899
Glory of the Snow 1899
Summer Songs 1900
Extra Christmas Part 1900
Extra Summer Part 1901
Extra Christmas Part 1901
Extra Christmas Part 1902
Extra Christmas Part 1903
Extra Christmas Part 1904
Extra Christmas Part 1905
Extra Christmas Part 1906
Extra Christmas Part 1907
(enlarged December issue in 1908 and 1909, but no
"Extras")