Try doing a search on a selection of numbers with Google. It works for me quite often. It is quite amazing how many railway sites there are out there these days, and forgetting to bookmark a quality site can mean a lot of failed searching to try and re-find it. If you are very lucky and have your 'history' file set to a very large memory capacity you may be able to go back a few weeks and discover your original search. But that is a bit of a long shot. So, just pick some loco numbers such as 37712 or 25303 and see what a search comes up with. I know it may seem a bit sad to some, but it keeps me amused sometimes when I cant be arsed to mow the lawn.