Police are growing increasingly concerned for the welfare of 74-year-old Kathleen Cutler, who has been reported missing from Liskeard in Cornwall.
It is believed Kathleen could have travelled by public transport to the Staffordshire area.
Her bus pass has previously been used in Telford on April 22. She is believed to have travelled on the Route 5 Arriva the Shires, Telford and Wrekin UA service.
The pass was also used in Derby on April 20.
Kathleen went missing from her Liskeard home on April 11 at around noon.
The last confirmed sighting of her was in Plymouth on April 18 at around 4.45pm when she was seen wearing an all-white paper suit with tanned-coloured, workman-style boots, and an orange face mask.
Kathleen is described as a white female, 5ft 3in in height, of medium build, with collar-length pink-coloured hair and blue eyes.
If you have seen Kathleen, or know of her whereabouts, please call police immediately on 999, quoting log number 587 of 16/04/20.