Mr Macmath has helped me in many ways in the preparation of this Sixth Part, and, as before, has been prodigal of time and pains. I am under particular obligations to Mr Robert Bruce Armstrong, of Edinburgh, for his communications concerning the ballad-folk of the Scottish border, and to Dr Wilhelm Wollner, of the University of Leipsic, and Mr George Lyman Kittredge, my colleague in Harvard College, for contributions (indicated by the initials of their names) which will be found in the Additions and Corrections. Dr Wollner will continue his services. Mr John Karłowicz, of Warsaw, purposes to review in 'Wisła' all the English ballads which have Polish affinities, and Professor Alexander Vesselofsky has allowed me to hope for his assistance; so that there is a gratifying prospect that the points of contact between the English and the Slavic popular ballads will in the end be amply brought out. Thanks are due and are proffered, for favors of various kinds, to Lieutenant-Colonel Lumsden, of London, Lieutenant-Colonel Prideaux, of Calcutta, Professor Skeat, Miss Isabel Florence Hapgood, Professor Vinogradof, of Moscow, Professor George Stephens, Mr Axel Olrik, of Copenhagen (to whom the completion of Sven Grundtvig's great work has been entrusted), Mr James Barclay Murdoch, of Glasgow, Dr F. J. Furnivall, Professor C. R. Lanman, Mr P. Z. Round. and Mr W. W. Newell.
July, 1889.
