These have been referred to by your astronomer Lowell as "CARETS," named so by reason of their peculiar shape.
"The Planet Mars and its Inhabitants A Psychic Revelation"
Eros Urides and J. L. Kennon
These so-called "CARETS" are the thoughtful provision for the impounding of a season's supply of water.
"The Planet Mars and its Inhabitants A Psychic Revelation"
Eros Urides and J. L. Kennon
These so-called "CARETS," as the telescope will show, are located at the edge of some of what appear to you as very dark areas on our planet.
"The Planet Mars and its Inhabitants A Psychic Revelation"
Eros Urides and J. L. Kennon