American author of humorous novels about life in Southern California, Texas, Mexico, and Newark, New Jersey under the name Mary Lasswell. She was born in Scotland to American parents and grew up in Brownsville, Texas.
Her first book, Suds in Your Eye (1942), published by Houghton Mifflin, was described as "a crazy, funny story" about three impoverished but high-spirited and beer-loving elderly women. It was adapted into a Broadway Play by Jack Kirkland in 1944.
Laswell followed with five other books about the same three women, Mrs. Feeley, Mrs. Rasmussen, and Miss Tinkham, plus their handyman, only known as "Old-Timer". These included High Time (1944), One on the House (1949), Wait for the Wagon (1951), Tooner Schooner (1953), and Let's Go for Broke (1962), all with illustrations by famed New Yorker artist George Price. Their home base for most of the series was called "Noah's Ark", and was a junkyard in San Diego, but the third and fourth books were set during travels. These books consistently featured certain themes: the main characters faced financial disaster, were usually forced to take innovative measures to ensure a homeplace, rescued other people with problems, and acted as matchmakers.
Lasswell was also an editorial writer for the Houston Chronicle in the 1960's.
She was married to Dr. Dudley Winn Smith, a surgeon.
She died at the Solvang Lutheran Home in Solvang, California of Alzheimer's disease.