Police today (Friday) issued an appeal for any information about sightings of American tourist Denise Gray on the day she was reported as missing.
Officers - including an underwater police team - were still focussing their search today on a 3km radius of the house in Revesby where she was staying.
It was initially reported Denise was last seen at 12.15 on Monday afternoon after going for a walk in the Revesby area.
Police have now revealed she was seen at Woodhall Spa on Monday morning.
She visited Janet’s tearoom on The Broadway in Woodhall between 8am and 8.45am.
Police say she returned to Revesby and the last sighting of her was on The Green - in Revesby - some time before 5pm that afternoon.
A police spokesman said: “We would like to build up a picture of what else Denise did that day and how she travelled.”
Police would also like to hear from anyone who saw or spoke with Denise in the days prior to her disappearance.
Officers are becoming increasingly concerned for the 52-year-old who was in this country on a holiday visa.
She had been staying in the Revesby area but did not have an established network of friends.
Officers have been checking local bus and taxi companies in an attempt to see if Denise travelled outside the Revesby area.
Meanwhile, today’s search also included the Operation Galileo Team and the Operation Support Unit.
It was concentrating on woodland and waterways in the Revesby area.
Police previously asked for residents in the area to check outbuildings
Anyone with information should call 101, quoting incident number 346 of March 3.