ww1 u-boats lower saltings medway

[barry]

I am researching the dumping of 26 ww1 u-boats on the saltings near Humble bee creek river medway photo's of 2 of them still there can be seen on this website
http://medway.fotopic.net/p2802121.html
I know 2 of them was U-126 a type UE2 minelayer and U-141 a type U-139 cruiser and merchantship class but i have never found any evidence of any others 375 where comissioned by the end of the war
Regards Bikerbaz