File:Kano City Dye Pit (1).jpg - Wikipedia

5 centuries in business: Nigeria's ancient dye pits

5 centuries in business: Nigeria's ancient dye pits

Kano (city) - Wikipedia

Notes on My Time in Northern Nigeria: January 1948 - August 1960

File:Kofar Mata Dye Pit since 1498.jpg - Wikipedia

File:Kofar Mata Dye pit workers beating dye clothes.jpg - Wikipedia

Nigeria's 500-year-old 'dye pits' survive despite threats

Kano state hi-res stock photography and images - Alamy

The Unknown Nigeria : The Kofar Mata dye pits of Kano

Kano (city) - Wikipedia

Indigo, ash and time mark Nigeria's centuries-old dye pits