Bryan, the lattice tower as you put it was also one of the cranes too, a sort of hammer head type if that gives you an idea as to what it originally looked like. The jib/derek ran across the top with rails and a small bogie travelled back and forth with the lifting hook cables. I'm very supprised it gone as it was long redundant and never used all the time I was it Swans, there was talk of it was going to be dismantled back in the 80's but just never got round to it. Its a shame its all gone but at least they'll see more use and just haven't been cut up for scrap, especially the big red one's (bloody stupid colour) preferred them in the blue/yellow livery with SHS shaped as a ship and not the daft fish on the back.