The Portland Art Museum has a gallery dedicated to silver artifacts. One section of this gallery has a display of argylls. According to the museum display:
“Argylls—vessels for keeping gravies, meat juices and sauces hot—first made their appearance in 1755. Most historians believe they were invented either for or by Archibald, 3rd Duke of Argyll, from whom the name derives. Argylls appear in silver, Sheffield plate and ceramic.”
In general, argylls resemble teapots, small coffee pots or lidded sauceboats. The spouts are placed low on the body. Some of the argylls on display in the Portland Art Museum are shown below.