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A and D. The alterations at A and D may stand as shown, if the new sheet is urgently required, but I intend to make further investigations in these localities as these streams, though unimportant, appear to continue; the question as to whether they "peter out" or find their way into the Ilo River may be worthy of investigation. I intend to take the results of these investigations home with me when I proceed on leave.

B. A slight alteration in the contours is necessary; the similarity at the end of the small spur is apparently due to an isolated hillock, such as are frequently to be met with in many places in the configuration of the country.

C. The contours have been adjusted, but the streams are unimportant, and the smaller ones are so numerous as to make the traverse of the whole system (if there is one) quite out of the question.

The contours have been thrown up stream. The stream is unimportant and frequently dry.

F. Plan reduced from recent survey of Iju Valley Water Supply is attached. G. The River Unren was, unfortunately, put in without my knowledge, after the contours had been projected, and therefore an adjustment has been necessary. The stream, however, is little more than a soakage.

H. This stream is of no importance whatever. From enquiry, I find that it probably recrosses the road. The general direction may be taken as shown on plan. I. This is a stream of quite minor importance, and can be regarded as shown on plan.

J. These are a series of soakages which might be omitted altogether; their flow is probably as shown.

K. These streams are almost on the frontier, and, in order that no friction might arise, the surveyors were instructed not to cross the frontier, and to be very careful when in that vicinity. The investigations in this locality are, therefore, not complete. I shall, however, supply the necessary information before proceeding on leave.

L. This stream is of no importance, and may be regarded as flowing as shown.

(1) Distinction is shown between international, provincial, and district

boundaries.

These are simply natural crossings at rivers and swamps.

(3) There are no bridges of any importance.

Boundaries of districts within the Colony are given. These were not

settled when the plan was forwarded.

(5) Plans showing details of Lagos Island, &c., forwarded which can easily

be reduced to required scale.

(6) There are no metalled roads, and none fit for wheeled traffic, excepting

immediately round Lagos. Bush and hammock roads are shown."

I would again request that these small details may stand over till I return on leave, when they can easily be settled. I submit that I should be allowed to super- vise the final preparation of this sheet, and that it is quite unfair to institute criticism until I have signed the finished proof.

Survey Department,

Lagos, 19th March, 1909.

E. P. COTTON,

Director of Surveys.

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3. In this case a vertical framework of contours at 25' V.I. has been erected on a horizontal scale of 1" to 2", that is four contours have been drawn in where one would have been sufficient, and in a map constructed as this has been the redundant contours have assisted to accentuate the inaccuracies in the topographical forms.

W. H. B.

25 March, 1909.

9030

SIR,

International boundary-

Provincial boundary-.

District boundary-...-

No. 19.

EAST AFRICA PROTECTORATE.

COLONIAL OFFICE to FOREIGN OFFICE.

Downing Street, 22 April, 1909. I AM directed by the Earl of Crewe to acknowledge the receipt of your letter of the 13th of March,* conveying the views of His Majesty's Acting Agent and Consul-General at Zanzibar on the scheme drawn up by the Director of Military Operations for a survey of the island of Zanzibar.

2. Lord Crewe caused your letter to be referred to the Colonial Survey Com- mittee, and he would ask that it should be explained to Sir E. Grey that the proposal for a complete survey of Zanzibar and the request for a detailed scheme for this purpose was made by Mr. Walrond Clarke, now His Majesty's Agent and Consul-General, when he was in charge of the Zanzibar Department at the Foreign Office. His Lordship would therefore suggest that it would be desirable in the first place to ascertain Mr. Clarke's views on the subject before the Committee express any opinion on the alternative proposals outlined in your

letter.

3. I am to add that the reference to the Commissioner of Works in the East Africa Protectorate which is made in the latter part of your letter is not clearly understood. Mr. Watts is not at present on leave of absence, and Lord Crewe doubts whether in any case he would feel himself qualified to advise on a matter of this kind.

12745

I am, &c.,

R. L. ANTROBUS.

PUBLIC RECORD OFFICE

Reference :--

TTIC.O. 885

اسلئس

20 PUBLIC RECORD OFFICE, LONDON

ALLY WITHOUT PERMISSION OF THE BE REPRODUCED PHOTOGRAPHIC- COPYRIGHT PHOTOGRAPH—NOT TO

(Confidential.)

On the map under discussion the vertical interval (V.I.) between the contour lines is not in proportion to the scale. The scale is 1:125,000 (practically 1 inch to 2 miles), and the V.I. should be 100'. 25' would be applicable to a scale of 2" to 1".

2. The practice is to make the V.I. the result of the division of 50 (a constant number) by the inches per mile of scale. Thus in this case the sum would be:-

50 ÷ - 100' V.I.

The result of the application of this rule is that V.I. decreases as the scale increases, ie., the larger the scale the more contours to be shown.

SIR,

No. 20.

SOUTHERN NIGERIA.

THE SECRETARY OF STATE to THE ACTING GOVERNOR.

(Confidential.)

Downing Street, 23 April, 1909.

I HAVE the honour to acknowledge the receipt of your confidential despatch of the 27th of March,t enclosing a copy of a letter from Mr. Cotton replying to the criticisms of the Director of Military Operations on Sheets 73 I. and 73 J., of the map of Southern Nigeria, and to request that you will be so good as to show Mr. Cotton's letter to Major Hills.

• No. 16.

I have, &c.,

† No. 18.

CREWE.