Leith (née Docherty) was born in Moose Jaw on April 13, 1924 to Scottish immigrants John and Jane Docherty.

Leith married Cy Knight in 1954. Cy was a popular radio host of the program “MailBag” on CHAB for several decades.

Leith started work for the Moose Jaw Public Library as secretary to the Chief Librarian in 1961, and held different roles such as secretary, assistant Head Librarian, and Head Librarian. Later she would work in reference department. Leith helped to develop the archives department of the library, making the Moose Jaw Public Library the first public library in Saskatchewan to have an archives department.

Leith wrote a history column for the Moose Jaw Times Herald from 1969 to 2013. It was most widely published under the title “Historically Speaking.” She also wrote two books, “All the Moose...all the Jaw,” and “Birds of the Moose Jaw Area.”

Leith served as the organist and choir leader at the Minto United Church, an organist at St. John’s (St. Aidan’s), and a relief organist at the Zion United Church.

She was also an avid bird watcher and kept cards listing birds that she had sighted over the years, as part of the “check-list of Birds of Wakamow Valley” that she co-compiled.

Leith was a member of Nature Saskatchewan, Nature Moose Jaw, the Saskatchewan History and Folklore Society, the Saskatchewan Archaeological Society, and the Canadian Club.

Cy Knight passed away on May 27, 2004.

Leith Knight passed away on June 27, 2013.