Many times genealogists have to read between the lines in a document in order to "squeeze out" as many details as possible. Be careful when you do this, making certain you have a valid reason and justification for thinking a record "says more than it does." Always include your line of reasoning and your rationale for going beyond what the document actually says in your research notes.
There are several reasons for doing this: 1) You may forget why you thought the record said more than it did; 2) Someone else may ask "where you got that--I don't see that;" and 3) you may be wrong.
The last reason rarely happens, but is a theoretical possibility <grin>.