All of the letters are to John Murray III. They are arranged chronologically.

1861: folios 1-2;

1862: folios 3-12;

1863: folios 13-26;

1864: folio 27;

1865: folios 28-30;

1866: folios 31-40;

1867: folios 41-48;

1868: folios 49-56;(1)

1869: folios 57-58;

1870: folios 59-70;

1871: folios 71-76;

1872: folios 77-92;

1873: folios 93-104;

1874: folios 105-108;

1875: folios 109-118;

1876: folios 119-139;

1877: folios 140-154;

1878: folios 155-158;

1879: folios 159-161.

(1) Includes reply of John Murray III: folio 56A.