改进题：I have pleasure in apprising you that, under the auspices of several highly respected and influential houses here, I have commenced business as a Shipping and Assurance Broker and General Agent

译文：我十分高兴地通知您，我开设了轮船与保险的经纪业以及总代理店是在当地几家有名望、有影响

改进题：I have pleasure in apprising you that, under the auspices of several highly respected and influential houses here, I have commenced business as a Shipping and Assurance Broker and General Agent

译文：我十分高兴地通知您，我开设了轮船与保险的经纪业以及总代理店是在当地几家有名望、有影响力公司的支持下进行的。

改进的译文：我十分高兴地通知您，在当地几家有名望、有影响力公司的支持下，我开设了轮船与保险的经纪业以及总代理店。