(UNDER-1 5 c.)

1

1830.  Tennyson, Poems, 125.

                    While wistfully they strain
Weak eyes upon the glistering sands that robe
The understream.

2

1883.  Pall Mall G., 26 July, 7/1. As the understreams formed by the Horseshoe Falls rise to the surface.

3