with复合结构和what含义疑惑？

Finally, with both of us combining our linguistic and imaginative resources, finally, after what seems another hour, we decode it.

请教老师：

1) with both of us combining our linguistic and imaginative resources 可否用完成时，即

with both of us HAVINg combined our linguistic and imaginative resources ? 为何？

2) after what seems another hour - 这句中，不懂seem到底是什么使用方法和含义，what在这里是主语吗？seems系动词谓语？ 那 another hour就是表语？

问题是：what到底代表了什么，的意思是呢？怎么样正确理解并翻译 what seems another hour ？？？

谢谢老师！

1) with both of us HAVINg combined our linguistic and imaginative resources

读起来给人一种前面做过的A事件对文中B事件的影响，显然与原文不合。

2) after what seems another hour，what名词从句，结构非常简单，类似what is another hour，用seem语气会缓和，what seems是一个容易见到的用法搭配