Who is Kwalish? My Google-fu could only bring up a forum thread about him, but I'd like to find more info.
Here's what I could quickly dig up:
Kwalish once wrote a spellbook titled "Extreme Powers of Observation". It contained the following spells: detect magic, detect illusion, identify, detect invisibility, glassee and locate object. (Dragon #82, p57).
Kwalish is pronounced "kway-LISH". (Dragon #93, p28)
From Dragon #244, p79: "The archmage Kwalish was immortalized because of his invention of the apparatus that bears his name, a rare and unusual magical item. Unknown to most people, however, Kwalish devised another apparatus later in his life, a creation that he considered a far superior accomplishment. Because of the dangers inherent in its use, however, the greater apparatus is much less common than its aquatic counterpart." This article goes on to describe the Greater Apparatus of Kwalish in more detail.
Then, from an article titled "The Rock of the West" in Living Greyhawk Journal #5, this section, which seem to be the most detailed reference:
"
Arm of Kwalish
The inventor Kwalish lived here over 400 years ago, and the fortified workshop he built for himself is still to be found high on an inaccessible rock pillar several hundred yards from the mainland. A narrow arch once spanned the gap between the cliffside and the pillar, but that has since crumbled into the surf below. The upper works are also much weathered but local residents still know this place as the Arm of Kwalish. It is thought to be filled with traps and guardians designed by the great inventor himself, along with a number of his other intriguing but generally less dangerous works.
Many examples of his works -- murals, sculptures, and bas-reliefs, as well as other, specifically mechanical inventions are found throughout Zeif and abroad. Even the Sidi of the sea people was one of his patrons. Kwalish designed the great Dome of the Reef for that renowned ruler of the mermen, as well as numerous devices for the use of his subjects. The various minor inventions of Kwalish are still highly sought after by collectors, as are the original plans for his creations. Some believe that Kwalish left scrolls with his outlines for several major unfinished works hidden somewhere in his workshop; but if he did so the plans are well concealed for they have never been brought to light."