Sphenoid sinuses â behind the ethmoids in the upper region of the nose and behind the eyes. Each sinus has an opening into the nose for the free exchange of air and mucus, and each is joined with the nasal passages by a continuous mucous membrane lining.Therefore, anything that causes a swelling in the nose-an infection, an allergic reaction, or an immune reaction-also can affect the sinuses.inusitis is an acute or chronic inflammation of the nasal sinuses. Health care experts usually divide sinusitis cases into three categories based on the duration and frequency of occurrence.
President Thomas Jefferson commissioned the Corps of Discovery Expedition (1804-06), led by Meriwether Lewis and William Clark, to explore the territory acquired in the Louisiana Purchase, among other objectives. In 1801, Spain signed a secret treaty with France to return Louisiana Territory to France.
Both Lewis and Clark were generously rewarded for their services, each receiving large parcels of land and double pay. President Jefferson appointed Lewis governor of the Territory of Upper Louisiana in March 1807; inexplicably, Lewis waited a year before going to St. Louis to take up his new duties.