The mucous membrane of the mouth, nose, Sinuses of the head, throat, and lower respiratory passages are also involved.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
As the drawing represents but a vertical section of the head the reader should note that the Sinuses, like the eyes and nostrils, lie in pairs to the right and left of the centre of the face.
"Resonance in Singing and Speaking"
Thomas Fillebrown
99.5. Both Sinuses discharging very freely.
"Report on Surgery to the Santa Clara County Medical Society"
Joseph Bradford Cox