In the nearly unexplored central part of Nicaragua Dr Lehmann found fragments of painted polychrome clay pottery similar to objects known from the Ulloa Valley (Honduras) amongst other ceramic pieces which seem to have been left by the ancestors of the Sumo Indians, now extinct in that territory.
The western neighbours of the Sumo Indians were and are (though few still survive) the Lenca Indians, who formerly occupied large parts of Honduras.
It seems that there was formerly a mutual interpenetration between Lenca, Sumo and Chorotega tribes.
The Sumo-Misquito Indians occupied the Atlantic coast and the interior of Nicaragua and Honduras, where they still live in small tribes; a dialect of the hitherto unknown Sumo languages.
There is no doubt that, at the time of the Pipil invasion, tribes of the Sumo-Misquito family were the immediate neighbours of the Pipils towards the east and north.
Several tribes, such as the Paya (or Poya) and the Jicaques, form together with the Lenca, Sumo (Matagalpa, Tauakhca and Ulua) and Misquito one great family.
The Misquito country is characterized by names terminating in laya, water, or auala, river; the Sumo and Ulua country by names in uas, water; the Matagalpan by names in li, water; the Lenca by names in tique, lique, isque and (ai) quin.
Probably the Mexican elements superseded the Maya so completely that there remained no trace of the Maya except archaeological objects; it is to be supposed that the Lenca and Sumo tribes superseded the Chorotega in Salvador.