This image immediately follows page 464 of the book.  The image caption reads: “Parliamentary &amp; Other Offices, Courts &amp;c. Westminster. The part within the dotted line shows the extent of the fire Oct. 16, 1834."  The following description is at page 447-448 of the book: 
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<td valign="top" style="border: none; padding: 4px 10px;">A general Ground Plan of the entire site of the Palace and Parliamentary buildings, forms the subject of Plate II; and shews the relative positions, arrangements, sizes, &amp;c. of the numerous offices and apartments connected with the two Houses of Parliament and the Law Courts, as they appeared previous to the fire in October 1834. A brief notice of this plan, with references to its details, will furnish the stranger with much useful information. The <i>oldest parts</i>, marked darker in colour than the rest, are, A.A. The <i>Great Hall</i>, B. <i>The Old Court of Requests</i>, afterwards the House o. Lords, and made the House of Commons since the fire; (1. The King's Robing Room. 2. Lobby. 3. Stairs. 4. Lord Chancellor's Room.) C. <i>The Painted Chamber</i>, fitted up for the House of Lords in 1834-5. D. <i>St. Stephen's Chapel</i>, late the House of Commons. E.E. <i>The Cloister</i>, attached to the same. F.F.F. <i>The Speaker's House</i>, with its official appendages, being part of the collegiate buildings. G. Part of the offices of <i>the Exchequer</i>. H. Houses of John Rickman, Esq. Clerk Assistant of the House of Commons, and Wm. Godwin, Esq. Author of the " Life of Chaucer," &amp;c. I.I. Stairs to the House of Commons. J.J. Committee Rooms. K.K. The Judges' Entrances to the respective <i>Law Courts</i>, which are numbered on the Plan in the following order: 1. <i>Court of King's Bench</i>, 2. <i>Court of Equity</i>. 3. '<i>Court of Exchequer</i>, 4. <i>Court of Common Pleas</i>, 5. <i>Vice Chancellor's Court</i>, 6. <i>High Court of Chancery</i>. J. Lord Chancellor's retiring room. 8. Judges' retiring room. 9. Attendants' waiting room. 10. Barons' retiring room. 11 .Bail Court. 12. The Lord Chancellor's entrance. L.L. <i>Grand Inquest Jury Rooms</i>. L.* Library of the Masters in Chancery. M.M. <i>Committee Rooms</i> to the House of Lords. N.N. <i>Arcade</i> to the House of Lords. O. <i>The King's Entrance Porch</i>. P. Entrance to the <i>King's Staircase</i>, which is at Q. R.R. <i>The Royal Gallery</i>. S. <i>Library of the House of Lords</i>. T. T. T. <i>Parliament Offices</i>. U. <i>Library of the House of Commons</i>. V. House of the Clerk of the House of Commons. W. <i>Long Gallery</i>. * * Open Courts.
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<a href="https://en.wikipedia.org/wiki/Edward_Wedlake_Brayley" class="extiw" title="wikipedia:Edward Wedlake Brayley">Edward Wedlake Brayley</a>, <a href="https://en.wikipedia.org/wiki/John_Britton_(antiquary)" class="extiw" title="wikipedia:John Britton (antiquary)">John Britton</a>
<i>The History of the Ancient Palace and Late Houses of Parliament at Westminster: Embracing Accounts and Illustrations of St. Stephens Chapel, and Its Cloisters, - Westminster Hall, - The Court of Requests, - The Painted Chamber, &amp;c</i>