A friend of mine worked this out and sent it to me. Gabby's up there:
League goals in successive seasons
• 15 - Joe Bache (1900-01 – 1914-15)
• 14 - Billy Walker (1919-20 – 1932-33)
• 13 - Gabriel Agbonlahor (2005-06 – 2017-18)
Johnny Dixon (1946-47 – 1958-59)
• 11 - Charlie Athersmith (1890-91 – 1900-01)
John Devey (1891-92 – 1901-02)
Allan Evans (1977-78 – 1987-88)
Harry Hampton (1904-05 – 1914-15)
Dicky York (1919-20 – 1929-30)