"Done" is not a single value and thus must be queried for through the relation. The asset type that represents one entry of hours is called an Actual. The relation, through the Workitem base is called Actuals.
So you would 'root' your query with something like Story, or even Workitem. Then use the 'sel' to select the member and value (hours).
http://<host>/VersionOne/rest-1.v1/Data/Story?sel=Name,Actuals.Date,Actuals.Value,Actuals.Member
That might be a bit overwhelming data-wise, so you'll probably want to limit it to one story:
/rest-1.v1/Data/Story/1038?sel=Name,Actuals.Date,Actuals.Value,Actuals.Member
Please note that if you track at the task/test level and not the story level you'll have to navigate that relation as well:
/rest-1.v1/Data/Story/1031?sel=Name,Actuals.Date,Actuals.Value,Actuals.Member,Children.Actuals.Date,Children.Actuals.Value,Children.Actuals.Member
The other way you could do it is from the Actual asset itself. The data would be the same but the result might be more consumable:
/rest-1.v1/Data/Actual?sel=Date,Value,Member.Name,Workitem.Name