Comparative Handbook of Congo Languages: Being a Comparative Grammar of the Eight Principal Languages Spoken Along the Banks of the Congo River from the West Coast of Africa to Stanley Falls, and of Swahili, the "lingua Franca" of the Country Stretching Thence to the East Coast, with a Comparative Vocabulary Giving 800 Selected Words from These Languages, with Their English Equivalents, Followed by Appendices on Six Other Dialects