Pair of Indigenous Sand Paintings, Signed (See Description)

As shown, the pieces are beautiful and both in good condition.
The larger framed sandpainting on canvas depicts a Navajo Navuk Dancer with a piece of pottery and maize. it is initialed in the bottom left-hand corner, possibly reading "JES". measurements: 18 x 23
The smaller unframed sandpainting depicts a female Navajo and Bear (inscription on the reverse is difficult to read) by LeAnthony Harrison, measurements: 12 x 12