

Думав було, що це емблема виробника палітурок. Копнув глибше і виявилося - що це емблема не багато ні мало Richard Hobart FitzGibbon, 3rd Earl of Clare (1793-1864).
Це один з чотирьох знаків, що використовувався цим графом (інші є на цій сторінці: https://armorial.library.utoronto.ca/mottoes/n ; Там же сховище багатьох інших знаків).
Пошукав ще, і знайшов біографію власника книжки.
Richard Hobart FitzGibbon, 3rd Earl of Clare1
M, #13085, b. 2 October 1793, d. 10 January 1864
Richard Hobart FitzGibbon, 3rd Earl of Clare was born on 2 October 1793 at Dublin, County Dublin, Ireland.2 He was the son of John FitzGibbon, 1st Earl of Clare and Anne Whaley.1 He married Diana Woodcock, daughter of Charles Bridges Woodcock and Anne Crosbie, on 11 July 1825 at British Consulate, Dunkirk, France.2 He married Diana Woodcock, daughter of Charles Bridges Woodcock and Anne Crosbie, on 9 January 1826 at St. James' Church, Westminster, London, England.2 He died on 10 January 1864 at age 70 at 9 Kensington Palace Gardens, London, England, without surviving male issue.2
He held the office of Usher and Registrar of Affadavits in Chancery [Ireland] between 1810 and 1836.2 He fought in the Battle of Oporto.2 He fought in the Battle of Talavera.2 He held the office of Member of Parliament (M.P.) (Whig) for County Limerick between 1818 and 1841.2 He was Member of Parliament (M.P.) for County Limerick between 1818 and 1841.3 He held the office of Lord-Lieutenant of County Limerick between 1831 and September 1848.2 He succeeded to the title of 3rd Baron FitzGibbon of Sidbury, co. Devon [G.B., 1799] on 18 August 1851.1 He succeeded to the title of 3rd Viscount FitzGibbon of Limerick, co. Limerick [I., 1793] on 18 August 1851.1 He succeeded to the title of 3rd Baron FitzGibbon of Lower Connello, co. Limerick [I., 1789] on 18 August 1851.1 He succeeded to the title of 3rd Earl of Clare [I., 1795] on 18 August 1851.1 He held the office of Lord-Lieutenant of County Limerick between September 1851 and 1864.2
On his death, all of his titles became extinct.2 http://thepeerage.com/p1309.htm
Така цікавина. Залишилося питання: як книжка опинилася в нашій країні? Цього ми вже ніколи не дізнаємося (продавець був з Луцька). Здогадка: син цього графа, John Charles Henry FitzGibbon, Viscount FitzGibbon2 b. 2 May 1829, d. - 25 Oct 1854 загинув як пишуть в бою під Балаклавою (http://thepeerage.com/p12529.htm#i125286).
Ще би знайти нащадків цього графа, то може їм цікаво було б цю книжку отримати.