Police are concerned following the disappearance of a 60-year-old man.
Alistair was last seen on Alban Square, Aberaeron at around 10:15 am on Thursday 16 June.
Dyfed-Powys Police described him as 6ft 2ins tall, of large build and having short grey hair with glasses.
Alistair is thought to be wearing grey shorts and a pink or other light coloured polo shirt. He is believed to be travelling on foot.
Anyone with information is asked to contact Dyfed-Powys Police quoting reference number DP-20220616-251.