After the important era of her marriage, she seems to have relinquished her literary ardour. But in the year 1821, Mr Robert Purdie, an enterprising music-seller in Edinburgh, having resolved to publish a series of the more approved national songs, made application to several ladies celebrated for their musical skill, with the view of obtaining their assistance in the arrangement of the melodies. To these ladies was known the secret of Lady Nairn's devotedness to Scottish song, enjoying as they did her literary correspondence and private intimacy; and in consenting to aid the publisher in his undertaking, they calculated on contributions from their accomplished friend. They had formed a correct estimate: Lady Nairn, whose extreme diffidence had hitherto proved a barrier to the fulfilment of the best wishes of her heart, in effecting the reformation of the national minstrelsy, consented to transmit pieces for insertion, on the express condition that her name and rank, and every circumstance connected with her history, should be kept in profound secrecy. The condition was carefully observed; so that, although the publication of "The Scottish Minstrel" extended over three years, and she had several personal interviews and much correspondence with the publisher and his editor, Mr R. A. Smith, both these individuals remained ignorant of her real name. She had assumed the signature, "B. B.," in her correspondence with Mr Purdie, who appears to have been entertained by _the discovery_, communicated in confidence, that the name of his contributor was "Mrs Bogan of Bogan;" and by this designation he subsequently addressed her. The _nom de guerre_ of the two B.'s[46] is attached to the greater number of Lady Nairn's contributions in "The Scottish Minstrel."