'Costs of and Incidental to'
"Of course, if there is no litigation there are no costs of litigation. But if the dispute ripens into litigation, the question then arises how far the ambit of the costs is affected by the shape that the litigation takes"
"(6)It is obvious that the matters disputed before a writ or originating summons is issued, and the matters raised by a writ or the originating summons, and by any pleadings and affidavits, may differ considerably from each other. A wide-ranging series of disputed my be followed by a writ or originating summons which raises only a few of the issues; or a narrow dispute may be followed by proceedings which seek to resolve wider issues as well. How far does the ambit of the litigation extend or restrict the matters occurring before the issue of the writ or originating summons which may be included in the taxed costs on the common fund basis"