《徐霞客游记·粤西游日记十六》
如果用木头连接成木筏，我们这些人从水中在两旁拉着进去，便与船一样了。 
樵者曰： 舟不能至。若联木为桴，余辈从水中挟之以入，便与舟同。 
If we join pieces of wood together to make a raft, we can go in by having people pull it along from both sides while we are in the water. It will be just like a boat.