He was to have joined Clive at Katwa with a friendly force, but instead of doing so he merely sent Clive a letter promising to join him on the field of battle. On the 14th Clive's force reached Kalna, where it was joined by Watts, who had escaped from Murshidabad on the previous day. On the 17th they captured Katwa, with its fortress, after a slight resistance, and found the place well stocked with grain. On the 19th, while they halted at Katwa, the monsoon rains set in, and the troops, who were lodged in tents, had to take shelter in huts and small houses. On the same day Clive, whose anxiety continued to be very great, addressed the following letter to the committee at Calcutta: "I feel the greatest anxiety at the little intelligence I receive from Mir Jafar, and if he is not treacherous, his _sang froid_ or want of strength will, I fear, overset the expedition. I am trying a last effort by means of a Brahmin to prevail upon him to march out and join us. I have appointed Plassey as the place of rendezvous, and have told him at the same time that unless he gives this or some other sufficient proof of the sincerity of his intentions I will not cross the river. This, I hope, will meet with your approbation. I shall act with such caution as not to risk the loss of our forces; and whilst we have them, we may always have it in our power to bring about a revolution, though the present should not succeed. They say there is a considerable quantity of grain in and about the place. If we collect eight or ten thousand maunds" (eight or ten hundred thousand pounds), "we may maintain our situation during the rains, which will greatly distress the Nawab, and either reduce him to terms which may be depended upon, or give us time to bring in the Birbhum Raja, the Mahrattas, or Ghazi ud din. I desire you will give your sentiments freely how you think I should act if Mir Jafar can give us no assistance."