Hand painted in soft colors, postmarks still visible, old postcards offer views of scenes both familiar and removed. They evoke memories of a happy time gone by - and, like family photographs, they remind us of what's changed. Collecting 160 richly colored postcards from the past, Greetings from Baltimore provides an entertaining, nostalgic, occasionally ironic, always changing view of the best of Baltimore, from circa 1905 to 1955. Here are steamboats...