In an age of such exquisite contrivance and precision in mechanical and commercial matters, it might have been anticipated that the bad system of London cabs could not long survive. All dishonest businesses write their own doom. Those only thrive which sincerely seek the good of the public. Accordingly, it is not surprising, at a time when one-and-a-half per cent. is a fact in banking, to find two large and powerful companies getting up to supersede the bad, old, dear, cheating cabs with a new and civilised set. It is proposed by one of these bodies to 'provide for the public a superior class of carriages, horses, and drivers, at reduced and definite fares; to afford the utmost possible security for property, and especially prompt and easy redress of complaints.' With better vehicles at three-fourths of the present charges--namely, 6d. a mile--and these to be settled for in a manner which will preclude disputes, this company deserves, and will be sure to obtain, the public patronage. One good feature of the proposed arrangements will, we think, be highly satisfactory: the company will form a sufficient magistracy in itself to give quick and easy redress in the case of any wrong. But, indeed, from the precautions taken as to the employment of drivers, and the hold which the company will have over them, through the medium of guarantee and their own deposits in a benefit-fund, it seems to us that the good conduct of the men towards their 'fares' must be effectually secured. The other company proposes to have two classes of vehicles--one at 8d. and the other at 4d. a mile; and it contemplates the use of a mechanism for indicating the distance passed over. We most earnestly hope that both companies will succeed in establishing themselves and carrying an improvement so important to the public into effect. COLONIAL PENNY-POSTAGE. 'I shall write to every one in turn, but it is expensive sending to many at once,' says one of the poor needlewomen, whom Mr Sydney Herbert's Female Emigration Fund has enabled to obtain a comfortable home at Adelaide. Well might she complain of the expense. When at home, she could send a letter to the most distant corner of the United Kingdom for a penny. In Australia, she finds that the cost of sending a letter to her mother in London is a shilling. It is strange that the colonists do not make an outcry about so extravagant a charge. Of all the anomalies in English legislation, our colonial postage-system is certainly one of the most glaring; and yet, in the midst of so much effort for emigration and colonisation, hardly any one seems to be aware of it. The people of England, Ireland, and Scotland have, for the last twelve years, enjoyed the incalculable benefits of Penny-Postage, but they have never thought of extending its blessings to their fellow-countrymen, scattered abroad among our various colonies over the whole surface of the globe.