ms1790: Autograph letter signed, Rev Dr Thomas Guthrie to a Mr Blair.Advising him of his personal well-being.32 Duncan Terrace, Islington, 5 May ny.
ms1859: Autograph letter, signed, Rev Dr Thomas Guthrie to an unknown recipient. Concerning the meaning of the word Huguenot.Edgill, 12 July 1855.
ms1860: Autograph letter, signed, Rev Dr Thomas Guthrie to an unknown recipient. Concerning Inspiration in Scripture.Edinburgh, 2 September 1855.
ms1861: Autograph letter, signed, Rev Dr Thomas Guthrie to an unknown recipient. Concerning the Sabbath question.Headed notepaper, Leven, 10 September 1856.
The content of ms1859 to ms1861 suggests the identification of J Gilfillan as the recipient. cf msBX9225.G5 (ms1862).