Older County Histories: Northumberland

John Wallis, The Natural History and Antiquities of Northumberland: And of so much of the County of Durham as lies between the Rivers Tyne and Tweed; commonly called, North Bishoprick (1769)
  Volume 1
  Volume 2
William Hutchinson, A View of Northumberland with an Excursion to the Abbey of Mailross in Scotland (1776-1778)
  Volume 2
John Hodgson, A History of Northumberland (1820-1840)
  Part 1.
  Part 2, volume 1.
  Part 2, volume 2.
  Part 2, volume 3
  Part 3, volume 1
  Part 3, volume 2
  Part 3, volume 3
Eneas Mackenzie, An Historical, Topographical, and Descriptive View of the County of Northumberland, and of those parts of the County of Durham situated North of the River Tyne, with Berwick upon Tweed, ... (2nd edition, 1825)
  Volume 1
  Volume 2
[John Hodgson Hinde], A History of Northumberland. Part 1 (1858)
The Rev. Charles Henry Hartshorne, Feudal and Military Antiquities of Northumberland and the Scottish Borders (1858)
Northumberland County History Committee, A History of Northumberland (1893-1940)
  Volume 1. The Parish of Bamburgh with the Chapelry of Belford
  Volume 2. The Parishes of Embleton, Ellingham, Howick, Long Houghton and Lesbury
  Volume 3. Hexhamshire: Part 1
  Volume 4. Hexhamshire: Part 2. (Hexham, Whitley Chapel, Allendale, and St. John Lee) and The Parish of Chollerton, The Parish of Kirkheaton, The Parish of Thockrington
  Volume 5. The Parish of Warkworth with the Chapelry of Chevington. The Parish of Shilbottle. The Chapelry or Extra-parochial Place of Brainshaugh
  Volume 6. The Parish of Bywell St. Peter, The parish of Bywell St. Andrew with Blanchland, The Chapelry or Parish of Slaley
  Volume 7. The Parish of Edlingham With the Chapelry of Bolton, The Parish of Felton With the Chapelry of Framlington, The Chapelry or Parish of Brinkburn
  Volume 8. The Parish of Tynemouth
  Volume 9. The Parochial Chapelries of Earsdon and Horton
  Volume 10. The Parish of Corbridge
  Volume 11. The Parishes of Carham, Branxton, Kirknewton, Wooler, and Ford
Cadwallader J. Bates, The History of Northumberland (1895)

John Wallis
The Natural History and Antiquities of Northumberland: And of so much of the County of Durham as lies between the Rivers Tyne and Tweed; commonly called, North Bishoprick
(1769)

Volume 1 (1769)
[Text at Internet Archive - Text Archive.]

Volume 2 (1769)
[Text at Internet Archive - Text Archive.]

William Hutchinson
A View of Northumberland with an Excursion to the Abbey of Mailross in Scotland
(1776-1778)

Volume 2 (1778)
[Text at Google Books [Hints and tips]; Internet Archive - Text Archive.]

John Hodgson
A History of Northumberland
(1820-1840)

Part 1. (1858)
[Available at: Google Books [Hints and tips].]

Part 2, volume 1. (1827) [indexed]
[Available at: Google Books [Hints and tips].]

Part 2, volume 2. (1832) [indexed]
[Text at Internet Archive - Text Archive.]

Part 2, volume 3 (1840)
[Text at Internet Archive - Text Archive.]

Part 3, volume 1 (1820) [indexed]
[Text at Google Books [Hints and tips]; Internet Archive - Text Archive:  1 ;  2 .]

Part 3, volume 2 (1828)
[Text at Internet Archive - Text Archive.]

Part 3, volume 3 (1835) [indexed]
[Text at Internet Archive - Text Archive:  1 ;  2 .]

Eneas Mackenzie
An Historical, Topographical, and Descriptive View of the County of Northumberland, and of those parts of the County of Durham situated North of the River Tyne, with Berwick upon Tweed, ...
(2nd edition, 1825)

Volume 1 (1825) [indexed]
[Text at Google Books [Hints and tips]; Internet Archive - Text Archive.]

Volume 2 (1825) [indexed]
[Text at Internet Archive - Text Archive.]

[John Hodgson Hinde]
A History of Northumberland. Part 1
(1858)

[Text at Internet Archive - Text Archive.]

The Rev. Charles Henry Hartshorne
Feudal and Military Antiquities of Northumberland and the Scottish Borders
(1858)

[Text at Internet Archive - Text Archive.]

Northumberland County History Committee
A History of Northumberland
(1893-1940)

Edward Bateson
Volume 1. The Parish of Bamburgh with the Chapelry of Belford (1893) [indexed]
[Text at Internet Archive - Text Archive.]

Edward Bateson
Volume 2. The Parishes of Embleton, Ellingham, Howick, Long Houghton and Lesbury (1895) [indexed]
[Text at Internet Archive - Text Archive.]

Allen B. Hinds
Volume 3. Hexhamshire: Part 1 (1896) [indexed]
[Text at Internet Archive - Text Archive.]

John Crawford Hodgson
Volume 4. Hexhamshire: Part 2. (Hexham, Whitley Chapel, Allendale, and St. John Lee) and The Parish of Chollerton, The Parish of Kirkheaton, The Parish of Thockrington (1897) [indexed]
[Text at Internet Archive - Text Archive.]

John Crawford Hodgson
Volume 5. The Parish of Warkworth with the Chapelry of Chevington. The Parish of Shilbottle. The Chapelry or Extra-parochial Place of Brainshaugh (1899) [indexed]
[Text at Internet Archive - Text Archive.]

John Crawford Hodgson
Volume 6. The Parish of Bywell St. Peter, The parish of Bywell St. Andrew with Blanchland, The Chapelry or Parish of Slaley (1902) [indexed]
[Text at Internet Archive - Text Archive.]

John Crawford Hodgson
Volume 7. The Parish of Edlingham With the Chapelry of Bolton, The Parish of Felton With the Chapelry of Framlington, The Chapelry or Parish of Brinkburn (1904) [indexed]
[Text at Internet Archive - Text Archive.]

H. H. E. Craster
Volume 8. The Parish of Tynemouth (1907) [indexed]
[Text at Internet Archive - Text Archive.]

H. H. E. Craster
Volume 9. The Parochial Chapelries of Earsdon and Horton (1909) [indexed]
[Text at Internet Archive - Text Archive.]

H. H. E. Craster
Volume 10. The Parish of Corbridge (1914) [indexed]
[Text at Internet Archive - Text Archive.]

Kenneth H. Vickers
Volume 11. The Parishes of Carham, Branxton, Kirknewton, Wooler, and Ford (1922) [indexed]
[Text at Internet Archive - Text Archive.]

Cadwallader J. Bates
The History of Northumberland
(1895) [indexed]

[Text at Internet Archive - Text Archive.]