Your memory is fine, Art. As Stefan has on his site, 'Talking Blues/Hannah' were recorded by Bouchillon on 4 Nov 1926 and released by Columbia on some unrecorded date in April 1927 [Meade, Spottswood, Meade biblio-discography].
Stefan, there seems little doubt that Bouchillon was 'more original'. Linnell Gentry's encyclopedia of country music indicates Lunn toured with Uncle Dave and Acuff, but his earliest appearances on the Grand Ole Opry were in 1938, continuing on until 1958.
In his 'Country Roots: The Origins of Country Music' Hawthorn Books 1976, Douglas B. Green writes at page 58:
Another exponent of blues style, or more specifically a blues style, in country music's middle years was the Opry's Robert Lunn, 'The Talking Blues Boy'. Talking blues - hard-luck stories, occasionally quite risque, narrated over a bluesy guitar accompaniment - was not a new form, having been pioneered on record by Chris Bouchillon and others in the 1920s. It was Lunn, however, a frequent part of Roy Acuff's road show, who kept the style alive long after its initial popularity had waned, and it was thus unfortunate that Lunn died just as urban folk groups such as the New Lost City Ramblers were reviving the talking blues and delighting a new generation and a new audience with them.