Four UFO's fly in open daylight, close by, and with no sound whatever. They did

not seem the least bit concerned at being plainly seen
Description:  
My wife and I were leisurely walking on the beach at La Jolla on a bright cloudless dayOct.17, 65 when we saw a formation of 4 UFO's flying across our sight like airplanes flying in diagonal formation. They moved completely silent and without seeming effort. We were on the beach watching as they moved southbound about 1/2 mile inland from the ocean. They were less than 1/2 mile high
and it was in broad daylight.  They were darkish brown in color, disk shaped with a dome on top and 3 small domes on the bottomand lighted portholes.They were definitely directed, piloted, made no sound whatever, omitted no lights whatever, just flew silently with very fast velocity, perhaps 400 mph, or perhaps slower. They flew towards San Diego Airport.  I called the Airport and Mirimar Naval Station, and informed them both, also the police as well.  They were definitely not birds, nor balloons, nor airplanes  nor temperature inversions, nor light beams. They were real and we had them in sight
for about 6 seconds. After this incident my wife and I found a book in the library called "Flying Saucers and Outer Space" written in 1955. On one page was a drawing of a Flying saucer.  As soon as my wife and I saw the drawing we said immediately to one another "that is just what we saw".  The sightings were made near my residence at  ((address deleted)), La Jolla. Based on approximate subtended angle and my guess of distance ( I am an engineer as well as a math Professor), the objects were about 150 feet in diameter, perhaps 15 feet in height.