Conceiving a desire to possess a fine telescope, he began by striving to awaken interest in the subject of astronomy through a series of lectures. The first was heard by 16 people; but the last was listened to by an enraptured audience of 2,000. Availing himself of the enthusiasm thus generated, he organized the Cincinnati Astronomical Society with 300 members at $25 each, and started for Europe to find his telescope. His search was long, but successful and, returning, he plunged into the struggle to secure a suitable observatory. In the person of the eccentric but immensely capable Nicholas Longworth he found a helpful coadjutor. Upon the land which was donated by Longworth (located on the summit of Mt. Adams). Mitchel began the foundation of his building and John Quincy Adams, then more than 77 years of age, delivered an address at the laying of the cornerstone.