Framed coastal landscape painting in gilt frame

I lost my small framed coastal landscape painting yesterday around 3pm on the Eastern Shore. It's an 8x10 inch oil on canvas, in a light gold gilt frame with a tiny chip on the bottom-right corner and an etched vine pattern along the edge. The scene shows a pastel harbor with sailboats at sunset, and there's a faint signature in the lower left that reads 'M. Calder'. I last saw it at Riverside Market Café on Main Street near the marina, and I must've left it on a bench outside while I grabbed coffee. It’s sentimental—it was a gift from my grandmother—and I’d really appreciate getting it back.