When six weeks from the said publication have expired, the Government, if no such objections have been sent as aforesaid, or (where such objections have been so sent in) if in its opinion they are insufficient, may by like notification effect the proposed extension. The Government shall cause the substance of any notification mentioned in this section to be proclaimed and notified within the town or area affected by the same, in the vernacular of such town or area, by such means, and in such manner, as it may direct.