Rule 10 Enlargement or abridgement of time

[^f1 The judge or district judge as the case may be] may, upon such terms, if any, as he may think reasonable, enlarge or abridge any of the times fixed by these Rules for taking any step, or filing or sending any document, or giving any notice in any proceedings; and where any person has failed to take any step, or to file or serve any document, or to give any notice within the time or in the manner prescribed by these rules, [ the judge or district judge as the case may be] may, upon the application of such person, and if he thinks sufficient excuse exists for such failure, and upon such terms as, to costs or otherwise as he thinks fit, declare the taking of such step, or the filing or serving of such document, or the giving of such notice so done or effected, to be sufficient.